This is a ProMag 6 Round magazine for the Ruger LCP pistol in .380acp. Constructed from heat-treated blued- steel, with a follower, lock-plate, and base-plate molded from a proprietary DuPont Zytel based black polymer; and using a spring wound from Chrome-silicon wire and heat-treated for strength and reliability. ProMag magazines include a lifetime guarantee, if you ever have a problem with their magazines; simply return them to ProMag for replacement.