ProMag RUG-A10 Ruger P-Series Magazine 20RD 9mm Blued Steel - 9mm Caliber, Aftermarket Origin
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An extended 20-rd magazine for the Ruger P-Series* pistols in 9mm. Constructed from heat-treated blued- 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.