I built a wilson combat bull barrel 204 AR for this purpose
the above comments are very valid. I am a huge 204 fan and have enough supplies to last quite a long time. I have not experienced this feeding issue myself. Most of my coyote hunting is going to be under 100yds in tjis area. I shoot the 26gr varmint grenade mostly. Have 32s and 40s as well. The metal magzines function better than polymer mags. I have several 223 ARs as well. I built all of them.