Promag SMI35 S&W 22 LR M&P 10Rd Blued Steel Detachable Made In The USA, This S&W Mag Is constructed Of Heat-Treated Steel With a Blued Finish, Injection Molded Mag Follower And Chrome Silicone Wire. Caliber: 22 LR Capacity: 10 Finish: Blued Model: S&W Material: Steel Model Fit: M&P Brand Fit: S&W Capacity: 10 Manufacturer: Promag Mfg Number: SMI35 Model: S&W