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  • Bainter1212
    Calguns Addict
    • Feb 2013
    • 5936

    Something you don't see every day

    Hello folks,

    Today I got to play with an interesting item.

    This item happens to be a US M261 .22 caliber conversion kit for the M16 rifle.

    The Air Force contracted for a bunch of these back in the 70s and 80s. I picked this one up awhile back from a Gunboards seller, for a sinfully low price. Mine is dated March 1978.

    This is basically a drop-in kit to convert the AR/M16 to shoot .22lr. The bolt assy includes a chamber adapter, bolt and recoil spring. The unit is charged using the standard charging handle.

    The mag adapters are 10 rounders, and they drop into a standard mag. You don't even have to disassemble the mag......you just push the follower down and slide the .22 mag into place underneath the feed lips. The follower puts pressure on the adapter, holding it into place.

    Today I finally got a chance to put a few hundred rounds through this system, and I must say.....it works pretty good. I had a few failures to feed, seems one of the mags doesn't like to push the nose of the first round into the chamber, but otherwise it worked really well.

    Accuracy wasn't stellar, but wasn't bad either. I could consistently hit the little 4x2 steel squares at 50 yards on the rimfire range and knock them down. It didn't group like my 795, but I was satisfied nonetheless.

    If you come across one of these, don't pass it up. They are collector's items now, and I probably shouldn't have taken it out, but I just couldn't help myself.
    Mine came with it's manual, 5 mags, and a spare parts/tool kit.

    This fits in nicely with my collection of .22 military trainers.

    Have a great weekend!











    Sorry for the crappy photos!
  • #2
  • #3
    ccandgc
    Senior Member
    • Jun 2008
    • 2142

    Nice!
    -Chad

    Comment

    • #4
      highpower
      Calguns Addict
      • May 2012
      • 5298

      I have one of those. On mine I was getting light primer strikes due to the end of the firing pin being too large and spreading out the force of the strike. I disassembled it and reshaped the end of the pin to about 1/3 of the original size which gave it a more concentrated strike on the primer. Since then it has worked 100% with the proper ammo. I like to run it in either my suppressed Mforgery or suppressed SBR.

      I got mine from SARCO back in the day and I believe it was $129, or in other words about the cost of a 10/22 at the time.

      Originally the end of the firing pin was the same diameter as the hole in the bolt face:




      MLC member.

      Biden, proof that stupid people shouldn't be allowed to vote.

      Dumocraps suck balls.

      Comment

      • #5
        Bainter1212
        Calguns Addict
        • Feb 2013
        • 5936

        Originally posted by highpower
        I have one of those. On mine I was getting light primer strikes due to the end of the firing pin being too large and spreading out the force of the strike. I disassembled it and reshaped the end of the pin to about 1/3 of the original size which gave it a more concentrated strike on the primer. Since then it has worked 100% with the proper ammo. I like to run it in either my suppressed Mforgery or suppressed SBR.

        I got mine from SARCO back in the day and I believe it was $129, or in other words about the cost of a 10/22 at the time.

        Originally the end of the firing pin was the same diameter as the hole in the bolt face:




        I had a couple of light strikes. I attributed it to the match trigger that was in the lower.

        I know exactly what you are talking about with the firing pin - it leaves a really shallow round indentation.

        Sent from my SM-G920P using Tapatalk

        Comment

        • #6
          smle-man
          I need a LIFE!!
          • Jan 2007
          • 10580

          My daughter used one of these at her ANG unit for several years until they were turned in.

          I have a Ciener version which is similar. Great fun in my ARs!

          Comment

          • #7
            Bart1015
            Member
            • Apr 2016
            • 216

            I use one all the time. Black Dog makes purpose built mags for the M261 and it solves a lot of the feeding issues.

            Sarco still has complete kits and parts.



            Mags are here. Not hard to make them Cal. legal with a small screw.

            Black Dog Machine LLC - Manufacturer of .22 LR magazines for a wide range of conversion bolts and dedicated uppers such as the Ciener© .22LR AR-15 conversion kit, the CMMG .22 AR-15 conversion kit and the Olympic M261 .22 conversion kit. We also stock, springs, followers and more.


            Midway has the mags also. Not good reviews there. Mine work fine but I have had them for several years. Maybe the QC is not as good now.
            Certified Polygraph Examiner. I provide services for Criminal and Civil Litigation, Private Businesses, Law Enforcement/Fire Pre-Employment screening, Fidelity Concerns, and other types of Family Disputes.


            http://ToThePointPolygraph.com

            Comment

            • #8
              OHOD
              I need a LIFE!!
              CGN Contributor
              • Jan 2009
              • 11047

              Cool adaptor kit. Now it wont cost you an arm and a leg to go shooting
              sigpic

              INGSOC comes to America.
              Sip your Victory Gin folks, time's are a changin'

              Time it was, and what a time it was, it was
              A time of innocence, A time of confidences
              Long ago, it must be, I have a photograph
              Preserve your memories; They're all that's left you

              Comment

              • #9
                hambam105
                Calguns Addict
                • Jan 2013
                • 7083

                I bought an orginal GI one about 149 years ago. Never used it. If someone just has to have one let me know.

                Comment

                • #10
                  ccandgc
                  Senior Member
                  • Jun 2008
                  • 2142

                  Me!
                  -Chad

                  Comment

                  • #11
                    Madpyro
                    CGN/CGSSA Contributor
                    • Jun 2011
                    • 1368

                    149 yrs ago, wow, you’re old
                    sigpic94th ENGR. BN. USAEUR 75-78 / N.R.A. Life Member / SASS / Mineral County SAR

                    Comment

                    • #12
                      Bainter1212
                      Calguns Addict
                      • Feb 2013
                      • 5936

                      Originally posted by hambam105
                      I bought an orginal GI one about 149 years ago. Never used it. If someone just has to have one let me know.
                      Dang.....what's your secret? Fish oil?

                      Sent from my SM-G920P using Tapatalk

                      Comment

                      • #13
                        hambam105
                        Calguns Addict
                        • Jan 2013
                        • 7083

                        Naw Naw. Just kidding. It really wasn't 149 years. It was tens of thousands of years ago according to a lot the shooters who comment on my 1911 and wheelguns.

                        Comment

                        • #14
                          Grendl
                          Senior Member
                          • Jun 2009
                          • 1657

                          Originally posted by Bart1015
                          I use one all the time. Black Dog makes purpose built mags for the M261 and it solves a lot of the feeding issues.

                          Sarco still has complete kits and parts.


                          Already sold out. I'd be interested if someone runs across another ;-)
                          YOU NEED A GUN TRUST.

                          TLCGunTrust@gmail.com
                          Nothing I post here constitutes legal advice, nor can it establish an attorney/client relationship.

                          Comment

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