Pistol buffers just screw into the rear of the receiver and are locked in place with a regular carbine stock lock
The ingenious stock lock
system allows you to change to many different stocks with no training and no tools.
Once set to the shooter's preference, adjustable-tension tabs on the right side of the stock lock
both adjustments solidly in place.
The bolt stop is firmly pressed home by the stock lock
ring nut unit when the buttstock is installed.
The stock locks
securely into place, and I had no problems with it during live-fire testing.