ProMag Sig Sauer P220 .45 ACP (8)Rd Nickel-Plated Steel Magazine.
An 8-rd magazine for the Sig Sauer P220 pistol in .45 ACP . Constructed from heat-treated and Nickel-plated 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.