The BT53 Silo is a novel and patent product that attaches by means of a Picatinny rail. It provides a textured front that can be pressed into barricades, rubber side bars for “soft” side bracing and grip, 1000 denier cordura "bean-bag" bottom for “soft” interface on ledges, windows etc. and two flush cups.
One Flushcup is designed to accept the Novel BT54 “Flushcup Stud” (NOT INCLUDED) so the Silo can installed and removed with the push of a button.