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Thread: AR Pistols (humor me)

  1. #31
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    Quote Originally Posted by geminidglocker View Post
    I used the ACE receiver extension, it's full length.
    I'm not one hundred percent positive, but I think you have to have a shorter tube, pistol tube or what the correct terminology is to stay legal.

    Please correct me if I'm wrong. Just remembering gun shop talk
    Dead men tell no tales!

  2. #32
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    Quote Originally Posted by Texpatriate View Post
    If you are basically building a pistol AR to avoid the legal hassle, cost, and paperwork of an SBR, but otherwise want something similar to what an SBR would give you, OR if this is simply just a step for you in the process of building a legal SBR, then I would go with the "full length" receiver extension. The fact that you are using a 10.5" LMT upper rather than one of the really short uppers would suggest to me that one or both of the above is the case. I'm guessing you want something with some degree of usable practicality and that is "SBR-ish".

    The longer extension uses the same buffer and spring as a standard carbine receiver extension and will be heavier, balancing out the rear of the gun better (or at least that's the case with the RRA pistol extension). It seems like to me that the shorter extensions would cause reliability issues, but I have no experience with them myself. If it's just going to be a range toy that you're trying to make as small as possible and could care less about reliability, then do whatever you want.

    Thanks for the info. I looked at the RRA pistol extension on their website just now and I like the looks of it... plus its only like $25. I do not want to have a proprietary spring and buffer for this pistol build, and like to keep parts standard. So I will go with the CAR length tube.

    I had not originally planned on building a pistol, but a few months ago when I bought a couple of lowers, the vendor mistakenly sent me one marked pistol. Since it is a virgin lower, and was transfered to me as a receiver... I am GTG. My thoughts are that I will build this pistol using an LMT 10.5" upper that I can use on a SBR lower later if I choose to go down that road. And the pistol lower will be easy to sell later, possibly at a profit. If I end up liking the pistol then of course I will keep it, as one can never have too many black rifles or black pistols I do think it has some practical applications with the 10.5 inch upper.

    Next question... would you guys recommend a standard CAR buffer for the LMT 10.5 upper or the H Buffer? It seems like I have read on here that the LMT has a smallish gas port so the H buffer is not necessary... any drawbacks to the H buffer if it is not really needed? The H buffer is about 2x as much $$, so would rather not spend the extra dough if not necessary, but I want the gun (like all of my guns) to run 100%.

    Thanks!

  3. #33
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    Where the heck are you shopping that charges 2x for an H buffer so I can avoid them like the plague?

    YIKES! I guess that's the going rate? I could have sworn I only paid like 7 bucks more for my H buffer and 12 bucks for my CAR.
    Last edited by spamsammich; 12-07-09 at 23:44.

  4. #34
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    Quote Originally Posted by spamsammich View Post
    Where the heck are you shopping that charges 2x for an H buffer so I can avoid them like the plague?

    Bravo Company. $11 for the Car and $23 for the H... most other vendors seem similar


    Edit: Quick on the draw. Just saw your edit. Damn inflation!
    Last edited by SouthParkTactical; 12-07-09 at 23:49.

  5. #35
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    It looks like Rainier is charging a similar premium on the H, but 9.50 for the CAR, 18.95 for the H. If you can't swing the extra 9 bucks to help the gun run like a top, we've certainly hit hard times
    Last edited by spamsammich; 12-07-09 at 23:52.

  6. #36
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    If I could not afford an extra $9 or $12, I wouldnt have bought an LMT upper. ...But I dont like to spend more than I have to unless there is a good reason to.

    Can anyone comment on the best buffer to run with the LMT 10.5" upper?

    Thanks

  7. #37
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    https://www.m4carbine.net/showthread.php?t=42694

    This should help a little.

    I ran a H buffer with my pistol and it worked pretty well. Others have reported H2 or H.

  8. #38
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    Quote Originally Posted by spamsammich View Post
    https://www.m4carbine.net/showthread.php?t=42694

    This should help a little.

    I ran a H buffer with my pistol and it worked pretty well. Others have reported H2 or H.

    Thanks for the link. I spent some time reading the thread you linked, and all others I could find on here regarding the various buffers. What I have learned is the following:

    LMTs tend to have smaller gas ports than most, LMT ships complete guns with CAR buffers.

    LMTs will probably run 100% (non-suppressed) with the CAR buffer

    The H Buffer can't hurt and will probably aid in reliability with all ammo types.

    And in an unrelated development the LMT 10.5 that I pulled the trigger on is not available. So I just now ordered BCM 11.5 upper instead. Cant wait to get it together! The sale that Bravo Co is running right now on their uppers and BCGs rocks!

  9. #39
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    It's more like LMT has the correct gas port size. So will a BCM, that's what I ran when I had a pistol.

  10. #40
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    Quote Originally Posted by halo2304 View Post
    Three little syllables...Beta C!!


    My AR Pistol will likely end up heavier than my Rifle.

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