Originally Posted By: J GaltWhen I started reading the thread, I thought in addition to the gas port issue the OP mentioned, that simply feeding a 204 is difficult. My immediate thought was on buffer weight/ adj gas block and/or feeding mods on the magazine. Personally, I take my pmags apart and grind off the front guides so that the round acts like I want when the bolt cycles. If I don’t fix the pmag, then my 204s don’t feed right and that causes my bolt not to fully close.
pmags are the wrong answer for 204. the shoulder is placed improperly for as you noted the rib. so modification is necessary.
much simpler to keep to traditional stainless mags. havent tried lancer 300bo mags yet, those might be an option, but just havnet field tested.
point is - its not feeding 204 thats a problem, its that youre trying to use the wrong magazine to feed it from thats the problem.
204 feeds just fine if you dont try to reinvent the wheel doing it.