This is a great universal combat tactical shotgun sling shell holder for ATI MB3 tactical shotguns and Remington 870, Mossberg 500, 590, and many others. The black sling fits most shotguns with sling swivel studs and loops. This shotgun sling shell holder bandolier holds 15 extra 12 gauge rounds and attaches to most standard sling swivels and loops with durable steel spring hooks. This is a fully adjustable shotgun sling in black. It is constructed of high-quality elastic and 2" of nylon webbing. The non-slip backing keeps the sling in place. The Bandolier sling's maximum length is 51".