GLOCK 19/23 MAG EXT +5/+4 GRY 3129 | +5 9MM | +4 .40 Manufacturer Model Number: 3129 Manufacturer: Warne Model: Glock 19/23 Magazine Extension Type: Accessory-Magazines Item Type: Accessory Finish: Gray Shipping Weight: 0.2 Feature: +5 9MM | +4 .40 Mag Extension Feature: 6061 T6 Aluminum Billet Feature: Type 2 Anodized Finish Optic Adjustable Objective: false Optic Reticle Illuminated: false