jmccracken1214
Well-Known Member
Shot my new to me, ruger sr556 yesterday. Shot some hornady brass and wolf steel ammo. Ran great. cycled everything fine, the issue is.. not locking back on last round. Tried gas at all 3 settings, it would do it every once in a blue moon. I took the buffer and spring out of another AR, it locked back a little more often, but not everytime. I put that buffer and spring back in the other AR and swapped lowers.... locked back everytime... What gives? same buffer and spring, worked in 1 lower, but not the other. That would leave only the tube to be suspect? but what goes wrong with a tube?
I ordered a bcm kit, new tube, spring and bufffer... hoping this will be the cure.
I ordered a bcm kit, new tube, spring and bufffer... hoping this will be the cure.