Think twice about cutting the barrel. Its a lot of bad with very little good. Muzzle blast will be awe full, you lose velocity(power), more recoil, harder to hold steady, when shooting with people nearby they will hate you, elk 600 miles away will here your gun fire, fireball coming out the short barrel could start forest fires, in low light conditions people on the space station will see the fire from your shots, if you wear ear plugs AND muffs you will only slightly hurt your hearing when you shoot. Plus side- save a few ounces and be slightly handier walking thru thick brush.
Just walking on the edge of of my grave.