Legacy Sports ATIK5R250: 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.