Caliber .45, Increased capacity of 8-rounds. Features the text of the US Consitution 2nd Amendment laser engraved on the magazine. Carbon Steel tube, heat-treated for strength. Internal components are linked together to offer easy disassembly and reassembly. Lubricated nylon polymer follower with metal insert where the slide stop activates properly aligns all types of ammunition for the most reliable feeding. Spring is manufactured from from higher tensile music wire with a drawn phosphate coating for easier coiling properties and longer service life. Redesigned high impact polymer removable butt-plate is tapered to to fit funneled mag wells. Mec-Gar is proud to be the Original Equipment Manufacturer of magazines to most of the prominent firearm manufacturers for the last 40 years including AMT - Armscor - Astra - Beretta Bernadelli - FN Browning - BUL - Charles Daly - Colt - CZ - IMI - Kel-Tec - Kimber - Llama - North American Arms - Remington - Sigarms - Smith & Wesson - Springfield Armory - STI - Standard Arms - Star - Steyr - Tanfoglio - Taurus - Walther