CONSIGNMENT - CONDITION: NEW IN BOX
This Advanced Armament Corp. AR-15 Upper Receiver Assembly in 300 AAC Blackout is a pin-on, ready-to-shoot top end for use with any legally registered SBR or pistol AR-15 lower receiver. The Mil-Spec 4150 chrome moly vanadium steel barrel comes equipped with 1 in 7" twist rifling, M4 feed ramps, a low profile steel gas block, and is finished inside and out with a protective black nitride treatment for superior durability and corrosion resistance. The muzzle is threaded with a 5/8"-24 pitch for easy installation of a silencer, and is topped off with an effective AAC 51T Blackout flash hider.
The upper features a forged M4-style flat-top receiver onto which a KAC URX rail is rigidly attached. The URX creates a full length top rail surface when matched with the flat-top upper to accommodate almost any desired sighting arrangement. The heat-treated, full auto bolt carrier is finished in a slick Nickel Boron coating, and comes equipped with a properly-staked gas key and Carpenter 158 steel bolt assembly. This 12.5" 300 Blackout upper utilizes a pistol length gas system and is compatible with most subsonic and supersonic ammunition, with or without a sound suppressor in place.
- Upper Receiver: AAC A3 Flat-Top
- Barrel Length: 12.5"
- Barrel Contour: Medium
- Barrel Material: 4150 Chrome Moly Vanadium Steel
- Barrel Manufacturer: AAC
- Muzzle Thread Pattern: 5/8"-24
- Chrome Lined: No
- Barrel Finish: Black Nitride
- Twist Rate: 1:7"
- Chamber: 300 AAC Blackout
- M4 Feed Ramps: Yes
- Muzzle Device: AAC 51-T Blackout Flash Hider* (Loose - See note below)
- Gas System Length: Pistol
- Gas Block Diameter: 0.750"
- Handguard: KAC URX rail
- Sights: None
- Bolt Carrier Assembly Included: Yes
- Bolt Carrier Type: Mil-Spec, Nickel Boron Finish
* The AAC 51-T Blackout Flash Hider was left loose by the assembler at AAC per customer's order request.
What's in the Box:
- 1X AAC 12.5" 300 BLK Complete Upper Receiver with KAC URX Rail
- 1X AAC Nickel Boron Complete Bolt Carrier Group
- 1X Mil-Spec AR15 Charging Handle
- 1X Original Purchase Receipt
- 1X Original Packing Slip