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Posted: 12/8/2007 8:43:22 PM EST
Feel free to post pictures of yours and say a little about it. Please if you have time write out what your carbine consists of. I am still somewhat a newbie to this world and it would be awesome to have a write up of the viewable parts.
What would you guys suggest I look at? I have been looking at: Sig 556 POF 415 Rob Arms XCR Is there something coming out soon that I should be looking at or waiting for? I am open to any and all suggestions except something having to do with direct impingement. Thanks for any and all input ahead of time! |
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I'd recommend LWRC above those.
Magpul Masada hopefully will come out middle of next year and looks very promising. LMT is also coming out with a piston as well. |
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i really like what ive seen of the xcr in videos so far, im fiendin' real bad for one actually....so if you get one, plz give to me k thnnx?
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Look at LWRC as well. It would take way too many paragraphs to tell you why I chose it over the others. Learn about it and decide for yourself.
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I have read some about it, I did not see it being the most recommended though. I guess I need to take another look at it.
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Ive owned my LWRC for a couple of weeks now and love it. Very smooth shooting and reliable. The piston design is top notch. I rank it everybit as good as my 2 other POF AR's.
The XCR's and Sigs are nice but putting a piston on an AR platform makes for a pretty perfect rifle! Im 100% happy with my LWRC and the POF's. Im going to try and get some pictures up of my LWRC. Good luck with your decision. |
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Man, those are nice looking' rigs. Have you ever had a problem with the silicon nickel plating scraping off from the inside of the upper receiver on your POF's? Just asking because I'm having that problem with my new 415.
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i would say in this order. LMT "when its avilable", LWCR, or POF.
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My first POF( the carbine) is the older version POF which doesnt have the coating but my second one the 16'' recce does have it and I do not see any scraping or wearing at all. I have roughly a 1000 rounds or so through it. |
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Or: 1. Hk 416 in 10.4" 2. LMT MRP / P 3. LWRC SRT in 10.5" 4. POF in 11.5" Get your checkbook out though, as piston action does not come cheap. |
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Yeah, I was figuring I would be spending between $1500-$2200 depending on what I went with and how padded the package I chose was.
From what I read about the POF I figured it would be top dog with that coating it has that makes it so that it is self lubricating? Haha, no one has really said anything good about the XCR. Is it because its the kind of gun that once you buy it, thats what you have? Not so much transformering it up? Also, does anyone have any roundabout time they expect the HK 416 to be released onto the civilian market? |
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I highly recommend the LWRC.
Those guys have Engineered every detail of their weapon far beyond what any of the others do. After researching them as much as I could, I visited their factory and got an in-depth tour of everything that goes into their builds. They don't cut any corners. I've played with POF, HK, SCAR, XCR, and even the Colt prototype (no, I didn't shoot it). I still need to get my hands on an LMT and Masada. I would take LWRC over any of them. I'm convinced that it is the best AR and best piston rifle built. |
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WOW! Strong words! Im happy to hear that! |
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+1 i totaly agree, i almost forgot about the HK.. |
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I've shot every gun brought up in this thread except the Masada. I purchased an LWRC M6A2, very pleased with it. Id get an HK 416 if I could. I own an MRP and will get their piston conversion when it is available. I am very interested in the Masada. I dont much care for anything else anyone has brought up.
POF: Hate the rail, very bulky and changes the height of the iron sights and optic mounting platform. Too many reports of chamber problems that I have both read and witnessed myself. Company has a good following and a lot of supporters, but you dont have to look far for people who have had troubles and have returned rifles/uppers to the factory due to issues (usually barrels/chambers). Sig 556: Good argonomic controls, but its large, bulky and heavy. Not inaccurate, but probably the least accurate of anything we've discussed. Out of the box furniture is terrible. I dont want anything TAPCO makes and I especially dont want to have to pay around $1200 for anything with Tapco/First Samco accessories. Robinson XCR- Way heavy trigger with no replacements. Aside from that the gun shoots good and seems very capable. However, the company started a similar project years ago, M96 Recon Rifle. Promised many conversions for it (just like they are with the XCR), but never came through. The M96 is no longer even listed on their web site. Customers who bought it in hopes of getting in on this system are left hanging. I worry the XCR will see the same fate. XCR has been out a few years now. When it started they advertised it with multi calibers and barrel lengths. Here we are a few years later and only now are new barrel lengths and the first new caliber becoming available (6.8). I like the gun, I like the idea, but remain skeptical. Maybe Im dreaming, but the SCAR rifles interest me as well. Maybe I can buy one of the and a HK piston in 2010!? |
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Thanks for the info on the XCR. I definitely do not want to be investing in a system that could get dumped off in a couple of years and have to scavenge for overpriced/rare (because its out of production) parts.
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Im not saying that this will happen to the XCR. Im just saying that there's some M96 Recon owners outthere who arent happy. XCR seems like a good gun, like I said, Im just skeptical, and I think with good reason.
Edited to add, I agree with a few others. If you're looking into pistons, check out LWRC. I did and Im a better person for it! |
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No issues at all with either of my POFs! I cannot get these rifles to stop. The rail is large and the sights are rasied but as longas they are zero'd it doesnt bother me. The rail is built like a tank. No complaints with POF. Pretty damm accurate too.
MY LWRC is as sweet as anything out there. Awesome rail , well balanced, low recoil and muzzle rise. Ill get some accuaracy reports later on. I love piston op AR15's. I dont think that Ill be going back anytime soon. |
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Ditto on the info above. |
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LOL, It really is funny the sensibility of those who put rifles like the HK416 and LMT piston system at the top of any list with never using them and/or there not even out yet or out in any number to really have a large enough experience base of opinions to make a fair judgment on.
(I do love it too when people here remark about not liking the height of the POF Predator rails but love the HK416 and fail to notice that HK modified the receiver from US spec M16/M4 receivers raising the receiver rail height up to mate with there higher handguard top rail height to go over there piston system making it about as high as the Predator.) (as I'll point out again from MP5MachinenPistole's great Hk416 photo's on pg 2 of the Piston AR picture thread) Piston AR pic thread Atleast the POF, LWRC's, XCR's and Sig 556's have been out a while and all have there numbers of happy owners with different likes and dislikes. All of them have had there problem rifles too as any manmade product can have something done wrong at times. That doesn't mean every single rifle does from that manufacturer though and will be in the future. All those rifles can be good rifles from what I've seen, but in deciding about them I think unless you seem to put priority in the opinons of a limited number of guys on the net saying something is the bestest, bestest with very little detailed explaination why they feel that way and still nothing more than their opnion, than you really ought to look deeply into each rifle for yourself since it will be for you and not someone else. Look deeper in thought into it's design, features, cost and possible needed repairs with cost and availability of those parts and repairs before anything else and decide for yourself with what you really feel is the best for you separate from the opinions of others. |
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I did not realize the XCR was practically another breed of carbine (meaning if something broke I would practically have to get an XCR part because its not interchangeable with most AR15 gear.
I will more strongly consider a POF or LWRC, and look into both of them more closely. I am new to all of this stuff so the more KISS it is the better in my case. |
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I am aware that the HK416 raises your mounting platform, but I do not believe it raises it as much as the POF. If there is a difference, and I belive that there is, I'd be interested to know what it is.
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Having shot both, I can say that when I shot the 416 the extra height didn't bother me. It was just one mag but I didn't notice it. When I shot the POF it did. Just one mag as well but i was thinking "man this aimpiont is high" But i think that when I shoot an acog on an SIR Mike |
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Having shot both, I can say that when I shot the 416 the extra height didn't bother me. It was just one mag but I didn't notice it. When I shot the POF it did. Just one mag as well but i was thinking "man this aimpiont is high" But i think that when I shoot an acog on an SIR Mike |
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Is it worth it buying the entire rifle, or would it be more wise to buy the LWRC upper or POF upper and then buying, say, an LMT lower?
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No real benefit to having the entire rifle. It will usually cost a little more to get the whole gun because of the govt excise tax involved in selling a whole rifle vs selling an upper and lower seperate. Having said that, I'd kind of like to have the whole gun just for the heck of it.
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I'd like to know the exact height difference between the HK416 top rail height and POF's Predator rail myself, if just to know out of curiosity. Either the way all can look as is now at the pictures of both and see the distances from the ejection port it's pretty close.
To me it looks so close it's really very little difference to be a moot point and the HK416 just that, high also. On buying a whole rifle or just the upper and than put it on any lower you want there should be a difference in price overall, but that depends on what price you find a whole rifle for to start I'd say. There are good deals that can be found, but outside of that ordering and having a new one shipped should be as such. With buying the lower separate and upper separate as I did, you can have more to your advantage of different places to get each and having both faster. Especially since there are dealers around who have uppers in stock for the POF's. You can just order one from them and have it shipped straight to your door and get a nice lower from someone else to go to your FFL for the simple transfer cost and leave any wait time for direct from POF in the dust. I know that's what I'll do if want another AR. As it stands now too, if I do want another AR, it will be another POF. |
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The predator rail is high but damm! I would say that the rail being larger around the handguards takes more getting use too than the height of the rail. How did people get along when the carry handle was the only option. I personally like the higher rail because you can keep the buttstock where it belongs in your shoulder.
Im actually having to get use to the LWRC rail ( not that I dont love this ARM-R rail) now and will be installing a riser on my Eotech to bring it back up off of the flattop. |
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I don't understand why some don't seem to like it as it really isn't an issue to me either. I very much like the Predator as there a great railed forearm the provides better structural support all around for the forearm, and the barrel to receiver connection since the Predator rail slides over the receiver to use it for movement support of the Predator and barrel nut over the barrel. We're all different though so maybe they have shorter heads and necks. (that is meant as a joke) I've never really like the fact with the LWRC's too that you need to unscrew the top of the handguard to get to the piston action to clean. That means over time again and again those aluminum threads will start to wear down from it and eventually become loose and worn. You shouldn't need the clean the piston action everytime out as it's meant to go thousands of rounds but it will still need to be cleaned. I also don't like the spring used in the piston action above the barrel as the HK416 uses also. Springs get effected by heat beside compress and loose there strength and above the barrel especially at the chamber should get quite hot. It's just another spring to have replace to me. I very much like the POF design of not using one there and putting the return on the buffer spring alone which I mean to mainly use Tubb's chrome silicon buffer springs for which should last a very long time and won't have any heat put on them even though chrome silicon has a higher heat tolerance. |
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Is it worth paying more for the Predator rails or would the basic $1,000 upper be enough? Or should I shell out the extra $250-$250 for the rails?
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The threads on the rail will outlast your weapon and the spring does not loose strength and get worn out from heat on the LWRC. Your concerns are unfounded. The threads only need to apply clamping force the the other side of the rail to remain rigid and since the screws are captured it is impossible to cross thread them. They would have to be worn completely away to cause an issue. Your concerns on the screws might become an issue long after you are dead if you are concerned with your great grandchildren's inheritance from your own grandchildren. Your QD optics mounts will have worn out LONG before those screws do. |
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If you buy the whole rifle the lower will be covered under warranty, other than that no advantage. |
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Achilles1 , you are in fact correct in that the return spring on the LWRC piston will eventually wear out. The screws on the rail will too. Maybe there is enough meet to install a small stainless helicoil on the rail! Just like any other part on the rifle you will have to replace them over time. The screws and the return spring will probably last 30,000 plus rounds. Way more than I will ever shoot out of the gun.
That spring on the piston does help out. It plays a small part in reducing recoil. I like my guns to have no kick! Buying a complete weapon is nice. I bought my second POF as a complete rifle. The lower reciever from POF is extremely well made and very sexy. It made me feel all warm and fuzzy inside when I was walking out of the Gun Shop with that rifle! |
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Thanks for the support in being more realistic SRTM4. I know they will it's just not worth it to argue about it anymore though even with all intentions being good. I can see the extra return spring adding in a little recoil reduction though and I'm sure it will last for thousands of rounds as other recoil springs do, it's just something I'd personally rather do without. Is the LWRC piston action spring music wire, stainless or chrome silicon by the way? (for anyone who knows) On the lighter side part of me has always found the recoil of the M16/M4 and AR's in general to be very light anyways. Get use to or even put a couple hundred rounds through a G3 or an M14 and the AR's recoil is nothing. .................................................................. |
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Well put Achilles. I know where you are coming from. The least amount of parts that your weapon has, the less chance you have those parts to break!
I also like your loyalty to POF. Those rifles tend to do that to you. Then again all piston AR's are doing it to me! |
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It is not a coincidence that these two rifles are "self regulating" whereas the others are not. The spring serves a purpose. This feature allows the rifle to use only as much of the available gas as it needs to reliably cycle the weapon. The excess gas bleeds off. This won't matter to your typical weekend shooter. In good conditions, there are no reliability issues with a quality AR. This becomes an advantage though when you encounter variations in ammo. Underpowered ammo, overpowered ammo; it doesn't matter (to an extent) because the piston self regulates. What if fine sand gets into your receiver or you don't have the chance to clean for a long time? The weapon will require a little more power to cycle correctly. Self regulating piston takes care of that. How 'bout SBR? Shortening the barrel drastically changes the amount of pressure going through the gas port. That is why SBR ARs are known to be finicky and require careful tuning. Slap a self-regulating piston in there and your problem is solved. As to your concern about the screws and spring wearing out.... forget it. Other major components of your rifle (i.e. barrel, bolt) will wear out long before either of those parts. |
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The POF gas cylinder bleeds off the excess gas it doesn't need also through the vent holes you can see in the pic above on the bottom of the gas cylinder as the M14 does through it's vent hole. The LWRC while a nice system isn't Gods gift to piston rifles as far as I'm concerned. It's just a piston action and you either like or you don't, buy it or you don't. As has been said before also, that many like to twist or just give misinformation about the POF piston. While reversible the piston works either way in semi and is just designed to be able to slow the cyclic rate in fullauto on the POF's. I like the LWRC's myself to a point but not more than POF's that I want one instead as I could have bought one and still can if I do. Regardless of what other guys give their opinion on though, it's still not alot more than just their opinion as is mine, but mine is still what I decide on as I know at all ends what I look at to form it and trust it to not be hyped and biased to myself. No offense but I feel you guys don't really know much about the LWRC piston action springs life in actual testing data otherwise and I'd really like to here straight from someone at LWRC at this point just out of curiosity to know. For me though I know in my own experience for my decision that springs do wearout, compress and take a set and can be effected by heat. Some materials just more than others. I'd still like to know whether it's chrome silicon also or just regular music wire. The temper of both can be effected by the heat from the barrel with chrome silicon having a higher rate of tolerance to the heat and less compression set also. Either way if you fire enough rounds through the rifle the barrel can get burning hot and the spring does sit right above it. I'm just taking that into account. This is some of the same bickering though that I really don't like about these discussion at times and it takes alot of enjoyment out of them for me and seems to spread alot of misimformation as the internet is such an outlet for. |
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I dont know yet and cannot compare the 2 systems because I have not fired nearly enough rounds through the LWRC to even start comparing it to the POFs.
I do know that there are trade offs to having a return spring and not having one. Yes , not having a return spring is good because of the wearing out issues. POF piston op system is very simple and robust. Great for a combat rifle. That being said, not having the return spring causes the POF's piston to slide freely back and forth when the bolt is locked back. Not a big deal but still noisy. The return spring as I stated in another post helps to reduce recoil. Side by side the POF has more kick than the LWRC. Now there are ways around that. MGI's RRBuffer and 2x spring helped considerably on my POF carbine. With some tinkering I plan to try the same setup on my LWRC to help reduce the recoil even more. Ill find a good combination of spring and buffer that will still hold the bolt to the rear when shooting wolf ammo. Ill report on that at a later date. No matter how you look at it, both systems serve the same purpose. Keeping the AR15 clean and cool which help in reliability. Thats the bottom line. They are just a different approach to the same goal. And both systems seem to achieve this. If you want an extremely robust and simple system go with the POF. If you want a tad more refined system that shoots a bit smoother go with the LWRC. Just my 2 cents! |
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I apologize if I come across as bickering. I'm just trying to correct what I perceive as misinformation. I've heard the spring issue come up before in piston gun discussions and I just don't believe it is an issue at all. You are certainly correct that springs wear out and that they are affected by heat. I have no first hand experience in failure testing the spring in either H&K or LWRC. I don't know what the springs are made of, but was told by LWRC that it is "engineered" to last the life of the weapon. They recommend replacing it when you rebarrel a weapon. (it's a $3 part) They report though, in their own destruction testing, that the piston sets (including the spring) are lasting through 3 or 4 barrels. These are not the first weapons to use springs on their op-rods. Look at the FAL for example. Springs are successfully used in high-heat environments all the time. Vehicle engines for example: the valve lifters have springs. If you design the spring correctly (which H&K and LWRC obviously did) you won't have a problem with it. This is a non-issue. ETA: I would be interested to hear from the manufacturer also. |
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Changing it out at the barrel change sounds about right and just like the Fal and M14 you need to change there's out also. It's not like it's the end of world by far, and just my personal preference not to have it in the mix if I can have a choice on it which I do besides the other points of the POF's design I prefer. The LWRC's are a very nice rifle from what I've seen from them don't get me wrong, as even though there not my first choice, I still feel there a great choice. It's curious to know if they are chrome silicon as LWRC told you they were engineered to last the "life" of the rifle. Chrome silicon springs are used in alot systems for there lasting longer, heat tolerance and consistent action with valve springs being one of them. Tubb's says their chrome silicon springs will last the life of the rifle and other info I found in study of the material in springs said 500,000 compressions also. Even if they are though they still have a heat tolerance at a limited level whether high. All's good though with us piston lovers regardless of any bickering thoughts aside. As we are all part of the same community and this has been a pretty good discussion still. I don't know if I agree with SRTM4 about the LWRC being the more refined system choice. I'd prefer to look at them as just another good choice. |
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Achilles1, maybe I was going to far when I made that statement. Or maybe I didnt!
Just messing with you. No matter what piston manufacture it is, its probably a step in the right direction. |
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Now I am going to have to buy each system to see which is best....
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Yes sir, either way it's a step in the right direction. |
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Guys, I have or have had all of the currently available AR piston systems out there. ARES, POF, LWRC, and HK (remember, LMT's isn't out yet, nor is Colt's).
I still have a LWRC M6A2 upper and the HK. I really like the LWRC, and thought it was the shiznit---until I got the HK. Don't get me wrong, I still like my LWRC. But that HK is built like a fucking Swiss watch! The piston on the HK actually has a "suction" to it as you remove it. The gas blows out the front of the cylinder at an upward angle (away from the weapon). Where you have to (if you are a clean-nut like me) do a little cleaning around the rail system on the LWRC for the carbon, you don't have to on the HK. The rail system on the HK is sweet too---unscrew one screw and slide it forward and off the weapon. However, the HK is not a light upper by any means. YMMV. |
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I cant tell you how long a spring will last, or what its made of. I can tell you when I research and upper, I try to take a look at what people who own them are saying, both good *AND* bad. I looked pretty far and wide on the piston uppers available to me and found very little in the way of dissatisfaction from LWRC owner. Yes, there are a lot of happy POF owners too, but there are a noticeable number of complaints that can;t be ignored. This played more of a part in my decision than what a spring is made of or if I will have to replace it when my barrel is burnt. I'll gladly replace it at that point so long as my rifle will make it to that point. The LWRC seems to have a better chance of that than the POF.
Here is just one thread where a POF owner was having extraction issues with his upper and sent it back. When he got it back, the gun blew up. I don't know what cause the gun to blow up (POF says it was the ammo), but the fact that he was having issues with it prior to that is just as much a concern. He gets a brand new upper from POF (that's great of them to replace it) but when he gets this brand new upper back, he is still having problems. In this same thread, 4 other people chime in talking about problems with their POF uppers. Mike_Hawk on page 4, Ador on page 5, hurricanekev on page 6 and SinEater on page 7. That's just one of the threads I found while researching my piston purchase. It was not the only one. On top of this thread, 2 people in the rifle club I belong to owned POF uppers. Both sent them back for service, both sold them when they got them back. Achilles, you are a prominent poster in that thread. I'm not saying that it isn't great that your POF is running great. I'm a happy guy for anyone whose gear is running well. But the fact that yours, or anyone Else's, is running well, doesn't make it any easier for the 5 guys above who are having problems, or the two guys in my rifle club who couldn't get theirs to run well (one of them posts here I think as MikeB). *ALL had similar issues. Failure to feed, failure to eject. I have an Armalite AR10 that has been absolutely friggin flawless in over three years of shooting it (quite a bit I might add). However, I frequent the AR10 forum and have seen for myself a sizable number of other AR10 owners to know that not every one's AR10 is running as well as mine. And I will tell people that when they are talking about AR10's. I will also tell them that Armalite has always taken care of problem rifles, like POF seems to be. But just because my rifle is running well, I cant ignore others who are having problems. Nor will I fail to mention these problems (as you are) to new prospective owners, like the OP here. I don't drink anyone's kool-aid, and I'm not about being down on one company, but I do like to get a well rounded view of something before I drop a large amount of what little money I do have. If there a problems with LWRC guns that have not been mentioned, I'd sincerely like to know about them. Anyone, please post them, with links. Consider this post to be an example of problems I have seen with POF. This doesn't mean all or even most of their uppers have issues. But id does mean some, and to me it is enough to notice and mention. |
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For the hell of it and to be sure I wasnt being an ass, I ran a 30 day search on POF: Thats 12 people (to include the two I know) with problems in the last month.
putter complains of silicon nickel plating scraping off his upper (Achillies you are in this one too?) www.ar15.com/forums/topic.html?b=3&f=118&t=352741 dotcombust, Eldage and allestergrendel all complain of tight chambers: www.ar15.com/forums/topic.html?b=3&f=66&t=346072 JDCaduceus compalins of more feeding problems: www.ar15.com/forums/topic.html?b=3&f=66&t=339212 |
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