The BT53 SILO is a novel and patent pending product that attaches by means of a Picatinny rail and provides; a textured front that can be pressed into barricades, Rubber side bars for "soft" side bracing and grip, a bean-bag bottom for "soft" interface on ledges, windows etc. and two flushcups. One Flushcup is designed to accept the Novel BT54 "Flushcup Stud" so the Silo can installed and removed with the push of a button.