I have an LMT MWS and it was problematic suppressed with all ammo except some match ammo (FGMM, Hornady ELD)
I first went with a heavier buffer from heavy buffers. Nope, still problematic. Finally emailed LMT and they recommended an adjustable gas key by Rubber City Armory for the BCG. Once I got the AGK set up, my MWS has run like a Swiss watch with NO FTE,FTF at all. Of course, that now makes the BCG only suitable for suppressed use as it will not work unsuppressed. Without having to constantly adjust the gas key, I want and bought a new LMT MWS complete BCG for unsuppressed use. Not a cheap option, but it works both ways now.
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