Quick view Howa Howa ATIFPM1500 Ammo Boost Floorplate Howa 1500 Short Action Polymer Black $41.68 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... Compare Add to Cart