This is a belt attached (using the BTS attachment system) slung weapon holder. The flap is secured with Hook & Loop and is fully adjustable for any size weapon. Works great for slung rifles, manual entry tools etc. when running, swimming, rappelling and/or fast-roping. This gives an operator quick access after hitting the ground and prevents dangerous swinging of a firearm during extreme movement. Also fits on all BlackHawk Omega vests for secondary utility tools.