Ok moving on to a PTR 7.62x39 with registered seat pack. This gun is stock except for a carrier spring change to make it work in full auto. Gun fire a great with the full auto pack. Full auto rate of fire is very slow compared to the 53 or other hosts. This is one of my favorite hosts to shoot. PTR does good work. I use Magpul, Bulgarian, and avoid metal mags. Other than that this fun works great with all steel case ammo.