SIG P320 9MM MAG EXT +5 BLK 3211 Manufacturer Model Number: 3211 Manufacturer: Warne Model: Sig Sauer P320 Mag Extension Type: Accessory-Magazines Item Type: Accessory Finish: Black Shipping Weight: 0.15 Feature: +5 9MM Magazine Extension Feature: 6061 T6 Aluminum Billet Feature: Type 2 Anodized Finish Optic Adjustable Objective: false Optic Reticle Illuminated: false