PMAG 20 M3 AR/M4 5.56 20RD BLK 100 CASE PACK Manufacturer Model Number: MAG560-BLK Manufacturer: Magpul Model: PMAG 20 AR/M4 Gen M3 Caliber: 223 Rem | 5.56 NATO Type: Accessory-Magazines Item Type: Accessory Firearm / Accessory Capacity: 20 Finish: Black Overall Length: 5.6" Weight: 4 oz. Shipping Weight: 0.3 Feature: Colt-spec AR15/M4 Firearms Feature: Anti-Tilt Follower Feature: Flared Floorplate Optic Adjustable Objective: false Optic Reticle Illuminated: false