the muzzle end. No other mods. I was just wondering cause I shot at a starling at about 30 yards and it didnt seem to even bother him. I know it was a hit cause I could see the pellet in flight and see the pellet hit. It knocked off feathers. Then a few days later
with my newly aquired mk1 about the same distance same kinda bird and knocked him down and out. The first airgun was my 2240 with a 14 inch barrel and a power adjuster.