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Posted: 2/8/2005 8:22:27 AM EDT
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Ok guys, I am finishing up for first build and need a little more advice. I am trying to decide what bolt/carrier to use. I am going chrome bolt/carrier with titanium firing pin. I can't decide what to go with....LMT, CMT, or DPMS. I have added links to show you exactly what products I am looking at. Also, is the LMT Advanced Bolt worth the extra money? Thanks, you guys have been a big help so far! Allison CMT and LMT DPMS |
Save your money on both. You can get ~2 firing pins for the cost of one Ti firing pin. Plus if you ever pierce a primer your high dolloar Ti firing pin is basically shot. The chrome BC is another waste of money. Just go with standard GI parts and you will be fine. The thing you should do with the money you save is buy more ammo.
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+1 Titanium firing pin = waste of $$ |
JP Tactical Stainless with Colt bolt. Runs like it's on ball bearings. +1 on the bling scale, also. Standard, park'd bolt and carrier would be the best bet for any application, though, Colt being your best choice of all out there, although I'd go with an RRA enhanced carrier with a Colt bolt, if I had a choice. Ditch the Ti firing pin. Nothing gained there. |
Specialized Armament Warehouse sells them; about as cheap as you can find them unless you luck out and find one on the EE! SAW |
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SP62644 BOLT ASSY, CARBINE (MPC or C) COLT FACTORY EXTRACTOR SPRING ASSY W/ BLACK INSERT 125.00 SP64027 BOLT ASSY, COMMANDO (MPC or C) S/A GREEN HD EXTRACTOR SPRING ASSY W/ BLACK INSERT 125.00 SP62116 BOLT ASSY, RIFLE (MPC or C) COLT FACTORY EXTRACTOR SPRING ASSY W/ BLUE INSERT 125.00 Can someone explain what the difference is between the bolt for the carbine, the commando and the rifle? |
Bolt is the same, extractor, spring and insert may be different. |
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I'm sure I'll piss all kinds of people off, but anyone who uses a parkerized bolt carrier assy is an idiot. Chrome is tougher, slicker, easier to clean, more consistent, less prone to corrosion. As I just posted in another thread, that was the ORIGINAL design, and what all USAF M16s had until those army logistics redisigned things without consulting with Stoner, then forced everyone else to adopt. HC carrier and bolt, no forward assist = no jams, even after hiding in muck and sand and pouring 300 rounds through. Why in the world anyone with an option bothers with parkerized is beyond me, and why anyone imagines it's somehow superior is boggling. It's a critical internal part. If you're wasting $300 on a stock, $500 on rails so you can stick ONE flashlight on, etc, invest the $60 difference in a REAL bolt carrier. Yeah, I'm an asshole about it. |
No, you're not an asshole. Just wrong  And BTW, if you'll send me a couple of bucks to cover my time, and postage, I'll send you an original Air Force carrier key, with half the chrome worn off of it. I'll even dab some instant blue on it, to highlight where the chrome wore down to bare metal.And where do you think that worn off chrome went? You think maybe it got driven into the aluminum walls of the upper reciever? Hard chrome application techniques have improved since the 1960s, and a quality finished current production chromed carrier is unlikely to do what they did back then; especially when only fired semi auto---but there was a good reason why the total chrome plate was dropped. All that being said, I do have an original Colt smoothside chrome bolt/carrier in my M16 clone; but then it only gets fired a couple of hundred rounds a year, so I expect I'll not have any problems w/worn off plating. For the XM177E2 clone, which has been class 3d for the past 25+ years, and gets fired about 2-3,000 rounds a year, it's parked all the way.
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+1, and since the chrome is harder than the receiver, it wears the receiver faster. the parkerization wears in the receiver and stops at a point, the rest actually helps reliability. use a chrome carrier and more often than not when it wears one way, it continues to wear the receiver in the same place. now all stainless bolt carrier, there may be something to that, but even then the effects are the same as a standard carrier. |
Was the rest of the carrier worn? The key has no bearing or matting surfaces, at least on the out side. What caused the platting to wear off? Perhaps hot gasses impinging on it? It would seem to me that the aluminum upper is so much softer than the carrier, bare, parkerized or chrome platted, that it wouldn't really matter that much...and the chrome is easier to clean. Now if you're really after bling check out some of the NiT coated ones. |
That's a better choice than the standard AR carrier, IMO. The RRA enhanced carrier is very similiar to the LMT you described, but much more affordable. RRA enhanced carrier with Colt bolt will serve you very well. |
+1 |
And anthor +1 on the RRA enhanced carrier. I picked up a RRA enhanced carrier group from Eagle Firearms (you can find them in the EE and IF) for $95 + very reasonable shipping. I was having problems with my new Bushy and sent it back to Bushmaster. I got the extra bolt carrier group in case I continued to have problems with the Bushy when I got it back. The good news is the Bushy runs fine now. With the orignal bolt and carrier and the RRA stuff (thanks Bushmaster!). The better news is I now have an extra bolt/carrier. The best news is I will use it in a CMMG upper I plan to buy to put on top of my post ban colt lower. I can't tell you getting the Colt parts is a bad thing. Not at all, quality stuff. But I don't think it's worth the extra expense. |
Yes, there was wear on the bearing rails on both sides, top and bottom. but the exAtlanta Brave ball player I built the rifle up for just had to have that "sexy" shiny caarier assy, so I found a plated key w/only a tiny bit of wear at one edge, and put it on for him. The bolt was parked. Look; politics, booze, sex, and guns are all areas where everyone has an opinion, and there is no "one right way" for any of them.
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