This is a Mecgar replacement magazine for Para Ordnance P18 9mm/38 super guns. This is an 18 round blued steel magazine that meets manufacturers specifications. These are the best magazines you can buy. Made in Italy using automatic seam-welding machines, and cutting-edge robotic technology to assist in the stamping and welding process resulting in improved quality and tolerances that exceed most oem specifications. Magazines bodies are made from AISI carbon Steel. The springs are made from high tensile strength music wire. Mecgar is the OEM manufacturer for Para Ordnance magazines.