With a reputation built on their dedication to manufacturing superior products for dependable performance, ProMag has become one of the leading makers of handgun magazines in the world. Gun enthusiasts and law enforcement personnel continue to rely on ProMag to feed the ammo they need into the guns they carry. Each magazine is created using either fine polymers or high-carbon, heat-treated steel for durability and consistency. Those made of steel are then tig welded for strength. Mfrs. limited lifetime warranty.