Built gun, all RRA parts. Midlegnth barrel.
Gun was lazily ejecting shells (spitting them only a couple feet) and would stovepipe at best every couple mags, at worst every 6 or so rounds. Checked the upper for everything and it was fine. Then, i noticed, that i have a heavy buffer and recoil spring. These are totally unneccecary for a midlegnth build.
Hope it works now.