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Building first AR pistol, seeking advice and input

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  • Notorious
    Veteran Member
    • Sep 2008
    • 4695

    Building first AR pistol, seeking advice and input

    As the title says, I am piecing together an AR pistol and have a few thoughts but wanted to know what anyone here with more experience has to say about the components that I have planned on using.

    The lower and upper have pretty much been picked out, but I have some more pieces that I need help with:

    * Pistol buffer tube - as far as the whole kit goes, I see the average starting price is about $70 for a whole kit with the pistol buffer tube, spring, plate and castle nut. Some come with the plate that has a sling ring for a hook attachment, some have a QD ready plate or castle nut, some don't take a castle nut, some have the foam baton cover, and some are short with a big knob on the end (Spikes?). What I am looking for is a simple tube that I can attach the CAA cheek piece to. What do you guys think about that CAA cheek piece? Is that better than the foam? What kit do you recommend? RRA? DPMS? Spikes? Chester Arms?

    * Forend/Handstop/AFG/AFG2 - I am not going to have a railed forend but I will have a quad gas block with 4 slots on the bottom which I think should be sufficient to mount a handstop of sorts. I don't know if the AFG2 will fit in 4 slots but it looks pretty small compared to the AFG. I don't mind if the rear of the AFG2 has overhang. As for other handstops, I saw the LaRue and Gear Sector, but I really am digging the Ergo Stop J-hook looking handstop. It looks the most secure because of the extra reverse hook that traps your hand instead of just a straight MP5K style nub that your hand can slip over. I don't know if the Ergo style is too long to make it considered a VFG though because it sort of has a conspicuousness like the evil pistol grip feature of the AR. Any advice?

    * Sling - pretty much settled on a single point bungee with the HK style clip on a lock plate with the little circle ring attachment, anyone have other suggestions?

    * Flash hider/Muzzle Brake - I want a KX3 but can't swing the $200 so I am going for a 3 port brake to help with the recoil on a short barrel, not sure if it is absolutely necessary on a 5.56 but since the flash is not going to be an issue for this plinker, why not go with a muzzle brake.

    Any pointers, advice, suggestions, or discussion appreciated. Budget is a consideration, of course, as long as it is not over the top crazy expensive... I might be able to swing it. Thanks in advance!
    I like guns
  • #2
    Grumpyoldretiredcop
    Calguns Addict
    • Sep 2008
    • 6437

    Spike's makes a good buffer tube setup. The foam cover they use doesn't interfere with the charging handle and is thick enough to be effective.

    You might want to reconsider mounting a handstop on your gas block. If it's plastic, it may melt (see the thread somewhere around here in which the OP was crying about his plastic BUIS melting on his gas block) and if it's not, it may become a little warm.

    Your sling choice is pretty much what I've used.

    Muzzle brake - I've used a standard A2 muzzle brake on both my pistol uppers, 11" and a 7.5". Recoil really isn't an issue.

    Build it, have fun with it!
    I'm retired. That's right, retired. I don't want to hear about the cop who stopped you today or how you didn't think you should get a ticket. That just makes me grumpy!

    Comment

    • #3
      bwiese
      I need a LIFE!!
      • Oct 2005
      • 27621

      I hope you have a legit pistol lower and you are not just taking a regular lower that was DROSed as a long gun

      Bill Wiese
      San Jose, CA

      CGF Board Member / NRA Benefactor Life Member / CRPA life member
      sigpic
      No postings of mine here, unless otherwise specifically noted, are
      to be construed as formal or informal positions of the Calguns.Net
      ownership, The Calguns Foundation, Inc. ("CGF"), the NRA, or my
      employer. No posts of mine on Calguns are to be construed as
      legal advice, which can only be given by a lawyer.

      Comment

      • #4
        Notorious
        Veteran Member
        • Sep 2008
        • 4695

        Nope, DROS'ed lower as pistol from the dealer. Paid pistol fee. Checked off pistol exemptions, the whole nine yards, to make sure it was marked as pistol.
        I like guns

        Comment

        • #5
          Notorious
          Veteran Member
          • Sep 2008
          • 4695

          Originally posted by Grumpyoldretiredcop
          Spike's makes a good buffer tube setup. The foam cover they use doesn't interfere with the charging handle and is thick enough to be effective.

          You might want to reconsider mounting a handstop on your gas block. If it's plastic, it may melt (see the thread somewhere around here in which the OP was crying about his plastic BUIS melting on his gas block) and if it's not, it may become a little warm.

          Your sling choice is pretty much what I've used.

          Muzzle brake - I've used a standard A2 muzzle brake on both my pistol uppers, 11" and a 7.5". Recoil really isn't an issue.

          Build it, have fun with it!
          Good point about the gas block heating up, just never thought it would get that hot.

          How about the CAA cheek piece? Effective or is the foam just as good?

          Mine is going to be a custom length, not 7.5" or 11". Don't want to talk about it until it's all done!
          I like guns

          Comment

          • #6
            Bongos
            Veteran Member
            • Oct 2005
            • 4095

            I have the battlecomp 1.0 on mine, keeps the recoil and muzzle down pretty good

            Comment

            • #7
              glock_this
              Calguns Addict
              • Dec 2005
              • 8225

              CAA cheek weld is just for looks, serves no real purpose. I use it, I like it, but it is more of a finishing touch IMHO and is no better or worse than foam. I just dont like the look of the foam.

              Consider a full auto BCG that has a little more mass than a semi auto BCG as it can help overcome some springs issues you see on these short buffer tube springs. I spent a little extra and got an LMT full auto BCG and never had issues other report here and there.

              I use MagPul BUIS - plastic - and have no issues.. even find that hella surprising someone says theirs melted?

              I do think a hand stop is a must have. Really helps with control.

              You can see mine and my specs in my signature
              10 +1 in the chamber

              Comment

              • #8
                Notorious
                Veteran Member
                • Sep 2008
                • 4695

                Thanks for the info!!!
                I like guns

                Comment

                • #9
                  Notorious
                  Veteran Member
                  • Sep 2008
                  • 4695

                  What's your opinion on the ergo grip hand stop? It looks longer than normal so I hope it's not going to be considered a vfg.
                  I like guns

                  Comment

                  • #10
                    thenodnarb
                    Veteran Member
                    • May 2009
                    • 2603

                    Originally posted by Notorious
                    Nope, DROS'ed lower as pistol from the dealer. Paid pistol fee. Checked off pistol exemptions, the whole nine yards, to make sure it was marked as pistol.
                    Where did you do this? How did you do this? I'd like to be able to get a pistol lower from a dealer but I thought it had to be a complete pistol, and single shot. So more info please

                    How I Powder Coat Pistol Bullets
                    How I Powder Coat Rifle Bullets

                    Comment

                    • #11
                      Notorious
                      Veteran Member
                      • Sep 2008
                      • 4695

                      Off roster exemption as LEO. Bought unmarked stripped lower. Going to build it from ground up.
                      I like guns

                      Comment

                      • #12
                        CJSdrftFlat
                        Member
                        • Apr 2010
                        • 153

                        Originally posted by Notorious
                        Off roster exemption as LEO. Bought unmarked stripped lower. Going to build it from ground up.
                        lucky

                        Comment

                        • #13
                          glock_this
                          Calguns Addict
                          • Dec 2005
                          • 8225

                          Originally posted by Notorious
                          What's your opinion on the ergo grip hand stop? It looks longer than normal so I hope it's not going to be considered a vfg.
                          Well personally, it is fugly so I woudn't get it just for that alone. And it is longer than normal.

                          People are using the Magpul AFG's on AR pistols these days, so..

                          I find an AR pistol is small enough, the AFG might be overkill IMHO.

                          Check out the KAC Hand Stop. I REALLY like the LaRUE (not out when I bought my KAC), but the KAC has a detachable sling mount as a bonus.
                          10 +1 in the chamber

                          Comment

                          • #14
                            Notorious
                            Veteran Member
                            • Sep 2008
                            • 4695

                            The gas block has only 4 rails and there is no handguard. I think the AFG2 might work but it will have overhang on the back which actually works out perfectly since that will give my hand somewhere to go instead of the barrel.

                            That is what would worry me about the KAC or LaRue handstops which depend on a few rails worth of XTM or other rail covers for you to put your hand on.
                            I like guns

                            Comment

                            • #15
                              swift
                              Senior Member
                              • Feb 2006
                              • 874

                              I have the Ace pistol buffer tube. I like it but the rear sling attachment point is not very strong.

                              Comment

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