This ProMag single-stack 8 round magazine is for your Smith & Wesson Model 39 pistol. It is constructed from heat-treated blued-steel, with a follower 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.
ProMag magazines are designed utilizing traditional stamping and welding of heat-treated high carbon steel. Every ProMag magazine is backed by a lifetime guarantee against manufacturer's defects.
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