With the Ammo Boost Advantage, rifles can be converted to accept detachable magazines. This detachable magazine kit is easy to install and drop-in ready, so conversion can be made in a matter of minutes at home. Instructions are included with each kit which includes one polymer magazine and a conversion trigger guard. This 5-round magazine is compatible with Howa 1500, Weatherby Vanguard, Mossberg 1500, Smith & Wesson 1500, and Interarms 1500 rifles in short action caliber: 22-250 Remington. Features: 5 round detachable magazine kits Kits for all short and long-action Howa 1500 rifles Also fits Weathersby Vanguards, S&W 1500, Mossberg 1500 and Interarms 1500 Easy to install, drop-in ready Made in USA