So I just bought a CMMG conversion online. $125 with a 26 round mag. What I would like to know is how exacly does it operate? I mean does the recoil spring seat against the buffer detent? Cause if so Ill have to add one to my lower sence I choose not to use one. Also would plugging the gas block port help or hurt? I feel dumb for asking these questions but sence I dont have it here yet to look at I cant wrap my head around how it works.