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Thanks. Does the DD feel like the M4 handguard, or is it bigger?
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I got KAC panels on my DD rails and they IMHO are the most comfortable rail out there. I was running the ladder panels but they got hot quick so I went to the KAC panels and it feel just as comfortable if not more than the M4 handguards. The lightness is also a very BIG +.
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Also, the "alignment pins" that come with the DD, do these lock the rail in place, or just make sure it is in line with the flat top upper?
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the ONLY thing they do is align the forend with the barrel nut. You have to align the barrel nut perfectly and not just enough to get the gas tube through...
I have done a little cutting of the "excess" at the end of the 9.0FSPM: More HERE With KAC panels: |
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Many are under the misconception that the DD rails are narrower than the Larue; they are not. What they are is taller, which makes them FEEL narrower. I own both and have taken the calipers to both. I don't have the measurements handy, but I know that they are the same width.
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that can't be true, that would mean the larue's aren't level with the upper becuase the DD's top rail sure is...
Bigbore- that's the upper you sold me with a few mods... Jtac- can you give me a better picture of the locking ring? I see they now include rail position numbers and would like to see more detail of the ring. thanks |
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DDs are lower, allowing the FSP models. |
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Taller does not mean that they sit higher. It means that they are taller in the vertical dimension. As Bigbore said, the bottom rail is lower. |
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JosephR, who makes that magazine pouch? Thanks to all who have given their input. Keep it coming!
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Is that a carbine length gas system with a PRI gas block? I was considering doing the same thing with a LaRue gas block since I have a DD 9.0 just laying around, but I figured the gas block would be farther back. |
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Thanks JTAC (Jason, right?) !
I don't know if I like that or not. I think I don't... It looks painted or coated and not smoothly anodized like mine used to be... I see what you are saying Bigbore. The DD is taller than the LaRue dimensionally but the tops of both are both level with the tops of the flattop receiver, right? Wierd... Websniper- TacForce makes the pouch. Bigbore sells the TacForce cases which come with one pouch. They are very nice. There is a soft case discussion going on somewhere right now and they've been mentioned by a few people. I have to give props to savvysurvivor.com which is who I got mine from before ADCO offered them in tan. Until recently, I didn't know how to get my hands on just the mag pouches. Maybe Bigbore can help you out but if not, Island Tactical (www.islandtactical.com) has them for about $20 in Black, OD or Tan. They were out of Tan so I got an OD and it's very Dark. I don't abuse my stuff and it doesn't get a good work out but their design is great. You can stuff a wooden paint stirrer down the backsides of the pouch compartments to loosen the velcro holding the flaps and either remove them completely or reposition them to allow for magpuls or whatever. You can tuck the flaps behind the pouch or even down inside the pouches if you want them out of the way of the mags. when down inside, there is elastic to keep them from wiggling around. The leftmost one in the pics is actually doubled over and tucked inside. Elastic under the front velcro and around the sides keeps each individual compartment tight too. The back is 100% hook velcro for attaching to a vest. I need a vest... |
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Thanks JosephR, I remember looking at that thread a few days ago. I just might have to get one of those case. They seem pretty decent. Still somewhat undecided on the rail system..... I would like to get both the Larue and DD in my grubby mits.
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Any advantage to the rails that extend past the front sight, or is that just for the uber-tactical crowd?
I'm considering upgrading my one piece RRA float tube to something like this when I have some work done at ADCO. |
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Protects you from hot FSBs during transition drills while giving you a bit more room to extend out a light, etc. It's not all about looks.... |
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Hmmm. Might have to upgrade then. Thanks! |
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Yep, I did the same thing with a low profile gas block and a 12.0 Larue. |
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Thanks, your rifle is badass. |
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thanks West996. Do you own a 996?
Nice rig AKM. I always thought DD forends looked good in place of KAC forends. |
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Can someonegive me the measurements of the DD? Top to bottom and width? Thanks.
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I'll try to remember to check when I get home tonight. I measured once before but can't find it now. |
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Well, I caved and ordered A DD 7.0 from Brownells. The great thing about them is that if I don't like it, I just send it right on back! I just have to touchy-feely before I buy. Thanks for the info guys.
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Wow, not nearly as much difference as I would have thought.....
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Well, just got my DD 7.0 from brownells. I don't have it on the gun yet, but I don't think I like the feel of this forearm with the ladder rails that it comes with. The oval profile just leaves too much space between the rails....My hand kind of likes to have something there. Any input from you guys on whether or not full panels feel better than the ladder type? I might get some magpul or TD full panels and try them before I send this thing back. BTW, Joseph, my tac force case should be in tomm. Thanks for the recomendation.
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What are you mounting to the rail? If you're using a forward grip like the Tango Down then your hand isn't going to be on the rail anyway. If you shoot with your hand on the magwell, your hand isn't going to be on the rail. If you shoot with your hand on the rail and all you're using is ladder covers, you're going to burn your hand regardless of whether its a Daniel Defense rail, or a Larue Rail.
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I am not planning on using a VFG. The main reason I'm getting a rail forearm is to mount a white light. I usually hold the forearm of the rifle, or the magwell. So, if I'm not wearing gloves, it sounds like you are recomending full rail covers.
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MagPul XT's. They're great, very slim, and fill that space you're talking about.
According to Forest's excellent AR15 weight table, there's only .1ounce difference in weight between the ladders and the XTs. |
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I can't help but see a problem with the difference in measurements. The DD appears to have a taller upper and lower rail. The LaRue MUST have a larger inside diameter then, huh? The LaRue side rails seem to stick out farther and if the diameter of the round portion of the tube is indeed bigger, they must REALLY stick out farther. what is the width of the two? |
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I know that you're just trying to understand all of this, but if you can't get it then just rest assured that the DD and the LT both work just fine and both put the top rail even with the flattop rail of the upper receiver. The width of the two is nearly identical, to within a couple hundredths of an inch. It may be hard to tell from this pic, but the top gun has a DD rail and the bottom one has a LT. Both are even with the flattop. |
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Is the actual tube for the DD oval? I was thinking it was perfectly round but the distance the rails are from it are what make it seem oval. With the top and bottom farther from the body and the sides in close, it would make even a round tube seem oval when looking at the overall section.
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The DD is 2.43" tall by 1.94" wide.
The LT is 2.23" tall by 1.95" wide. So they are both a little "oval", with the DD being slightly more so. This is what causes alot of people to think that the DD is narrower, simply because it looks like it would be. The LT difference is that hte LT rails are not equa-distant from the barrel in the vertical dimension. the bottom rail is closer to the bore-axis than the top rail is. |
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Yes, that does appear to be the case in the photograph above of the two rails. Notice that you can't really tell if the DD is upside down or not because it's symetrical (or very nearly) in each direction. |
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Somebody mentioned that it's hard to get the alignment pins lined up properly. Any feedback on this?
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it's absolutely 100% easy to line them up properly and you can't insert the forend into the locking ring unless they are aligned.
But, it is possible with the DD to not get the barrel nut perfectly aligned even though the gas tube seems to fit correctly. If the barrel nut is 1mm off, then the forend will be the same amount off. The alignment pins are put into the 3 o'clock and 9 o'clock holes in the barrel nut after you tighten down the barrel nut. They correspond to holes in the forend. I think I've got mine a teenie tiny bit off of being perfect right now... |
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Thanks joseph. That kind of what I was talking about. The fact that even thought the holes may be aligned close enought to allow the gas tube through, the rail might not be true to the rail on the upper. It kind of sounds like it is a trial and error/pain in the ass process.
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For me, it wasn't a huge PITA to align it all. It did take a couple of trial/error runs, but it' not really that bad. I think checking main bearing clearances is much more of a PITA by comparison. I still haven't tried a LaRue handguard, but I really like the feel of my DD 9.5 FSP. The profile makes it really comfortable (for me at least), and I have a hard time deciding whether or not to get one of the LaRues for my next railed upper or to get another DD. The lower rail seems to stick down just far enough to fit me perfectly. |
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