the primary use of the swat shotgun today is for door breaching.a shortgunloaded with a frangible slug (intended specifically for shooting down doors) is used daily for breaching doors that for whatever reason are not rammable.such shotguns are often equipped with a standoff device attached to the magazine tube. or a breacher device attached to the muzzle.a standoff device is a metal projection built up on the front of the magazine tube that keeps the muzzle off the surface of the door.this ensures that you do not damage the shot gun barrel through direct contack with the door.a