PROMAG : PROSMI22 SMITH & WESSON M&P 40 S&W 10 ROUND BLUE STEEL MAGAZINE
Description:
- Constructed from heat-treated blued-steel
- Follower, lock-plate, and base-plate molded from a proprietary DuPont® Zytel™ based black polymer
- Spring wound from Chrome-silicon wire and heat-treated for strength and reliability