I've replaced two gas keys on a M&P15 and a Stag to get rid of the CMT stake job. I went to VA Arms and bought what they carried. One was a RRA key and within the past year they have BCM on the shelf. I just use the home made chisel in a vise to stake. I was really suprised at how much harder I had to strike the BCM gas key to move the metal. David
FWIW on all my own BCGs that aren't BCMs I've replaced the carrier keys with BCMs. They're that good.
04-05-10, 11:39
Ned Christiansen
Fail Zero is up to speed on how critical the key is and the staking thereof. They have a benchtop, lever-actuated MOACKS.