ProMag S & W Model 39 9mm (8)Rd Blue Steel Magazine.
A single-stack 8-rd magazine for the Smith & Wesson Model 39 pistol in 9mm. 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.
