his proprietary detachable magazine is designed specifically to work with the Remington 700 or Howa 1500 action mounted in an Archangel precision rifle stock. The polymer magazine holds 30 rounds of .223 Remington or 5.56 NATO ammunition. It has a textured surface for a sure grip during magazine changes. ProMag is dedicated to producing superior products for dependable performance. ProMag magazines are manufactured and assembled in the USA.