This is a belt attached (using BTS attachment system) slung weapon holder. The flap is secured with hook and loop and is fuly adjustable for any size weapon. Works great for slung rifles, manual entry tools when running, swimming, rappelling, and 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.