- Sure, fill out the short-barrel shotgun paperwork... and then take this lil' guy home while you wait for that tax stamp to come in. Or, just leave the 18.5" barrel alone and enjoy all the benefits of an SBS without the fuss. It still holds 4+4+1 or 5+5+1 of 12ga depending on your choice of shell size. It's compact, features a built-in foregrip that houses a 450-lumen KeltTec light with momentary switch and Picatinny style rail up top for mounting your favorite optic.