So have any of you used one of the MD Arms gas plugs? A friend of mine bought one for me (and one for his S-12) a while ago as a thank-you for some gun stuff I did for him.
Anyway, I installed the plug (didn't have directions at the time, but read them later and I did it correctly) and my S-12 functions like poop. Same for my friend's gun.

Stock, my S-12 is very forgiving of practice-load pressures and still works comfortably with high-base buckshot. With the MD Arms plug, I can't cycle low-power shells, and high-power shells cycle the gun too vigorously.

I plan to switch back to my old plug, I'm just curious about your experiences.