PMAG M3 WINDOW 7.62 20RD BLK 100 CASE PACK Manufacturer Model Number: MAG1429-BLK Manufacturer: Magpul Model: 20 LR/SR GEN M3 Caliber: 7.62 x 51mm | 308 Win Type: Accessory-Magazines Item Type: Accessory Firearm / Accessory Capacity: 20 rnd Finish: Black Shipping Weight: 0.38 Feature: Fits most AR10 Platforms Feature: Anti-tilt Follower Feature: Translucent MagLevel Windows Optic Adjustable Objective: false Optic Reticle Illuminated: false