This floorplate/trigger guard helps convert rifles with from a box magazine to Howa’s Ammo Boost Advantage higher capacity detachable magazines. This black, polymer floorplate is compatible with Howa 1500, Weatherby Vanguard, Mossberg 1500, S&W 1500 and Interarms 1500 rifles in short action calibers: 223 Remington, 204 Ruger, 22-250 Remington, 6.5 Creedmoor, 243 Winchester, 7mm-08 Remington and 308 Winchester.