Fits great - CMMG, Inc MK3 Lower Parts Kit

Used to complete an 80% DPMS, everything fit great. The bolt catch pin is threaded so make sure your lower is set up for that before you buy and you’ll be in good shape. I oiled every pin and spring as I put them in, it is an absolute must do. Cycle every takedown pin, safety selector, etc. a few times with that oil in there and it gets smooth and quiet. Can’t beat the parts for the price.