I bought a rifle length 20" 5.56 upper from PSA that I want to put together a lower for. I have a lower with a 16" mid that is a standard PSA mill spec buffer. I put the 20" upper on it and it seemed to work fine. Should I just get another one of these or is there a different set up that would work better? I use it for target practice but want it for coyote hunting mainly. I guess I"m looking for as little recoil and muzzle rise for follow up shots if needed. Thanks, black friday is getting close and want to be ready with what is needed. Any suggestions on suppliers would be great also.