AR-556 5.56MM BLK 16" 10RD 8511 FORWARD ASSIST/DUST COVER Manufacturer Model Number: 8511 Manufacturer: Ruger Model: AR-556 Caliber: 223 Rem | 5.56 NATO Type: Rifle Item Type: Firearm Firearm / Accessory Action: Semi-Auto Firearm / Accessory Capacity: 10+1 Finish: Black Hard Coat Anodized Sights: Adjustable Ruger Rapid Deploy Stock Frame Grips: Collapsible / Folding Stock Six-Position Telescoping Weight: 6.7 lbs. Shipping Weight: 8.8 Feature: Flat Top M4 Design Feature: Milled F-Height Gas Block Feature: Heavy Barrel Optic Adjustable Objective: false Optic Reticle Illuminated: false