AR-556 5.56 NATO M4 Flat-Top Autoloading Rifle w/ Barrett Brown Cerakote Finish

Manufacturer: Ruger
Model: AR-556
Model Number: 8503
Caliber: 5.56 NATO
Weight: 6.50 lbs.
Length: 32.25 – 35.50 in.
Length of Pull: 10.25 – 13.50 in.
Width: 2.50 in.
Height: 8.00 in. (Without Magazine)
Capacity: 30-Rounds
Buttstock: Six-Position Telescoping / Mil-Spec Buffer Tube / Barrett Brown
Handguards: Heat Resistant Glass-Filled Nylon / Barrett Brown
Grip: Ergonomic Improved Trigger Reach / Enlarged Trigger Guard Opening
Sights: Elevation Adjustable Front / Windage Adjustable Ruger® Rapid Deploy Folding Rear (Front Sight Tool Included)
Upper Receiver: Flat Top 7075-T6 Aluminum Forging / Forward Assist Dust Cover and Brass Deflector / Type III Hard Coat Anodized
Lower Receiver: 7075-T6 Aluminum Forging / Type III Hard Coat Anodized | Cerakote Barrett Brown Finish
Bolt Carrier Group: Staked Gas Key / Chrome Plated Bolt Carrier ID and Gas Key ID / Matte Black Oxide Finish
Bolt: 9310 Alloy Steel / Shoot Peened / PT Tested
Barrel:

16.10 in. Medium Contour

Cold Hammer-Forged 4140 Chrome-Moly Steel

1:8 Twist Stabilizes Bullets from 35 to 77 Grain

M4 Feed Ramp Cuts

PT Tested

Threaded ½ – 28 with Ruger Flash Suppressor

Barrel Contour is .850 Under the Handguard .750 Under the Gas Block .700 Forward of the Gas Block

Matte Black Oxide Finished
Gas Block:

A-2 F-Height Pinned in Place

Multiple Sling Attachment Points and with QD Port and Bayonet Lug

Machined Low-Glare Serrations on Angled Face
Barrel Nut/Delta Ring:

Patent Pending Design

One Person Removal

Accepts Standard Handguards

Uses Standard Wrench Can be Swapped with a Mil-Spec Nut if Desired