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AR15 upper receiver caliber conversion list

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  • AR15 upper receiver caliber conversion list

    Okay, I've always wanted to compile a comprehensive list of upper receivers available for AR15 rifles, and all the various caliber conversions you can do. This doesn't mean a Delton upper vs. a CMMG or anything like that. I'm talking about caliber conversions, .45, 10mm, 9mm, 7.62x39, .300blk, etc. There are hundreds out there, and I have always wanted to make a list of the different ones available out there. If anyone else is interested in helping me that would be great, as I plan on compiling the list over the next week or so and I'll move it to the build forum. I realize there is going to be MANY different manfacturers in some of the calibers, but as long as we keep it of reasonable length I think the list would be useful. You might be surprised what's available. So try to keep the posts arranged in Caliber / Manufacturer / Model name.

    5.7x28mm
    AR Five Seven

    7.62x25
    RMW/Bazooka Brothers
    cncgunsparts

    9mm
    Colt SMG 9mm
    Rock River Arms 9mm
    CMMG 9mm
    Spikes Tactical 9mm
    Yankee Hill Machine

    10mm
    Olympic Arms 10mm A2
    RMW Extreme 10mm Upper DI

    .45ACP
    RMW AR15 A3 Flat-Top .45ACP BB

    .410
    T-14 AR-upper by ATI.

    .458 SOCOM
    Wilson Combat
    Rock River
    SBR Ammunition

    .50GI
    RMW .50GI 10.5"

    .50 Beowulf
    Alexander Arms .50 Beowulf

    .204 Ruger
    Sabre Defence .204

    .300 BLK:
    Noveske
    AAC
    DDM
    CMMG
    Red X

    5.45x39
    Model 1 Sales 11.5"
    S&W M&P15 16"
    Adams Arms 16" piston

    7.62x39
    Model 1 sales
    Del-ton INC.

    6.8SPC
    Rock river
    Bison armory
    Wilson combat
    Palmetto state armory
    Model 1 sales
    Stag arms

    .450 Bushmaster
    Bushmaster

    .50 BMG
    ALS Arms .50BMG
    Bohica Arms Mk IV .50 BMG
    Safety Harbor .50BMG
    Tactilite T1 .50 BMG
    Ferret .50 BMG
    Watson's Weapons .50BMG
    Last edited by CJ; 09-13-2013, 09:06 AM.
    "When the people find that they can vote themselves money, that will herald the end of the republic." -Benjamin Franklin
    "A democracy will continue to exist up until the time that voters discover that they can vote themselves generous gifts from the public treasury." -Alexander Fraser Tytler

  • #2
    5.45x39

    Model 1 Sales 11.5"
    S&W M&P15 16"
    Adams Arms 16" piston

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    • #3
      7.62x25: RMW/Bazooka Brothers & cncgunsparts (both DI)
      Originally posted by lincolnboy
      After watching Games of Thrones, makes me glad i was not born in those years.

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      • #4
        .204 ruger - sabre defense. (Red x sells them)
        .458 socom - Wilson combat, rock river, sbr ammunition
        .50 beowulf - Alexander arms
        03 cobra

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        • #5
          .410 T-14 AR-upper by ATI.

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          • #6
            I didn't know there was a .410 upper. I guess it uses pistol shells?
            "When the people find that they can vote themselves money, that will herald the end of the republic." -Benjamin Franklin
            "A democracy will continue to exist up until the time that voters discover that they can vote themselves generous gifts from the public treasury." -Alexander Fraser Tytler

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            • #7
              9mm yhm

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              • #8
                Dude, CJ, for your M16 you must get a 7.62x25 upper and magazine well block. They are even gas operated:




                Originally posted by lincolnboy
                After watching Games of Thrones, makes me glad i was not born in those years.

                Comment


                • #9
                  Originally posted by CJ View Post
                  I didn't know there was a .410 upper. I guess it uses pistol shells?
                  Midway shows it to be discontinued, anyway.
                  ZOMBIE REAGAN FOR PRESIDENT 2016!!! heh

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                  • #10
                    300BLK:
                    Noveske
                    AAC
                    DDM
                    CMMG
                    Red X

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                    • #11
                      6.8 spc
                      Rock river
                      Bison armory
                      Wilson combat
                      Palmetto state armory
                      Model 1 sales
                      Stag arms



                      450 bushmaster
                      Bushmaster

                      Edit: 6.5 grendel
                      Alexander arms
                      03 cobra

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                      • #12
                        Originally posted by CJ View Post
                        I didn't know there was a .410 upper. I guess it uses pistol shells?
                        any .410! its very weak, doesn't have any penetration. kinda of a novelty upper really. i find them from time to time on gunbroker. u can convert standard USGI mags from what i have heard.

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                        • #13
                          5.45x39 Spikes Tactical

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                          • #14
                            Originally posted by nightfly2000 View Post
                            any .410! its very weak, doesn't have any penetration. kinda of a novelty upper really. i find them from time to time on gunbroker. u can convert standard USGI mags from what i have heard.
                            It'll use 2.5" shells only. It won't use standard 2.75" or longer.
                            ZOMBIE REAGAN FOR PRESIDENT 2016!!! heh

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                            • #15
                              Originally posted by YALE View Post
                              It'll use 2.5" shells only. It won't use standard 2.75" or longer.
                              Huh,all i have are 2.5s. i didnt even think about the 2.75s. i know that some brands (2.5) still didnt fit in the mag, and it jams/stovepipes a lot.

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