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    Gas Cylinder Lock Issue

    Hello folks,

    The last Garand I purchased from CMP was a SG from March of this year. I noticed when I initially field stripped it, that the lock on the cylinder was on WAY TO BLOODY TIGHT! So tight, I had to get my father to hold the butt end of the rifle while I gently wrapped the barrel and gas cylinder in cardboard, placed that part in a vice and put a large crescent wrench on the lock. Two hits of the hammer and it came free. I think even by the armorer’s standards thats not tight, that’s BLOODY SCREAMING TIGHT. Now when I go to reinstall that part, it goes to about 3-4 o clock and locks up solid. Can’t budge it forward or even tap it. I took it back off and have it on my desk. What is the fix for this? Also of note, the hand guard does have a business card thickness between it and the gas cylinder which is ideal so nothing is wrong there. I just can reattach my lock without a crescent wrench. Help! Thanks to all in advance.

    Sean

    #2
    Try a different gas lock. They are not threaded the same. How are the threads on the barrel ?

    Comment


      #3
      Barrel threads are like new. It’s a 1964 SA barrel. Rifle was a SA 64 rebuild and shows little use.

      Comment


        #4
        In my experience a gas lock on that tight will affect accuracy
        Like already mentioned try another gas lock

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          #5
          Thanks for the input. I will get another lock on order today since I don’t seem to have a spare in my parts bin. Hopefully, that will take care of the issue. I appreciate it!

          Comment


            #6
            Ideally the gc lock should stop at the 6:00 position by hand only. As Bill pointed out, a too-tight gc lock is a detriment to accuracy.
            Jon

            Comment


              #7
              Well as an update I got a NOS lock on order from Garand Parts. Only $16 (doubt is NOS but what the heck). Looks to be in nice shape. Hopefully this works, but will repost once it comes in. Fingers crossed.

              Comment


                #8
                New gas lock arrived today covered in cosmoline. Will need to clean up and attempt to install on rifle tomorrow. Hopefully this is the fix.

                Comment


                  #9
                  Let us know.
                  Jon

                  Comment


                    #10
                    Unfortunately no dice. The picture with the lock positioned in the 4 o’clock position is the lock that came on the rifle. The one i just purchased is the picture showing it directly at 3 o’clock. Also, I included pictures of the threads and position of the gas cylinder ring in relation to that front hand guard as well.
                    Attached Files

                    Comment


                      #11
                      the fix is to use the new gas lock, back it off 3/4 of a turn and then install gas screw
                      When originally assembled armorers did not time gas locks. They picked one up off the pile and installed it

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                        #12
                        What Orlando said.
                        It's normal for the forward handguard to be a little "rattle" loose. Back off the lock until it's aligned with the gas cylinder, then install the gas screw.
                        The thief may possess something he stole, but he does not own it.
                        The owner has a right to take his property back from the thief.

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                          #13
                          Ok. Thanks guys. Even if there is a small gap between the lock and the cylinder thats ok?

                          Comment


                            #14
                            its impossible to have a gap between the gas cylinder and lock with the gas screw installed

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                              #15
                              When I back the lock off the 3/4 turn to get it back inline with the cylinder, this is the gap that results.
                              Attached Files

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