Advanced Armament Co (AAC) AR-15 A3 Flat-Top Upper Assembly 300 AAC Blackout 1 in 7" Twist 16" Barrel with KAC URX 3.1 Free Float Quad Rail Handguard, Blackout Flash Hider
- Remington Ammunition 300 AAC Blackout 220 Grain Open-Tip Match... $22.99 Out of Stock, Backorder OK
- Lee Factory Crimp Die 300 AAC Blackout... $10.54 Available
- Lee Pacesetter 3-Die Set 300 AAC Blackout... $33.99 Out of Stock, Backorder OK
- Remington Reloading Brass 300 AAC Blackout Primed... $26.99 - $129.99 Select Options
- Lee Case Length Gage and Shellholder 300 AAC Blackout... $4.99 Available
- Geissele Super Semi Automatic Trigger AR-15, LR-308 Small Pin... $210.00 Available
- Magpul PMAG M3 Magazine AR-15 223 Remington 10-Round Black... $13.25 Available
- Barnes VOR-TX Ammunition 300 AAC Blackout 110 Grain Tipped... $31.99 Available
- Magpul PMAG M2 MOE Window Magazine AR-15 223 Remington... $13.25 Select Options
- Loctite 222 Threadlocker Purple 10 ml... $12.99 Out of Stock, Backorder OK
- Archangel Magazine Mosin Mosin Nagant Stock 10 Round Polymer... $16.99 Out of Stock, Backorder OK
- FNH Magazine FN SCAR 17s 308 Winchester 20-Round Steel Flat... $39.00 Available
- Ruger BX-25 Magazine Ruger 10/22 22 Long Rifle 25-Round... $24.99 Available
- Hornady Varmint Express Ammunition 6.8mm Remington SPC 110... $20.99 Available
- Glock Magazine Gen 4 Glock 19 9mm Luger 15-Round Polymer Black... $24.99 Available
- C Products Defense Magazine AR-15 223 Remington 30-Round with... $9.04 Available
- FNH Magazine FN SCAR 16S 223 Remington 30-Round Steel Flat... $29.00 Available
- Hornady One Shot Sonic Clean Ultrasonic Case Cleaning Solution... $13.75 Available
The upper features a forged M4-Style flat-top receiver onto which a Knight's Armament free floating URX 3.1 Quad Rail System is rigidly attached. 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 16" 300 Blackout upper utilizes the versatile carbine length gas system, a good choice for this cartridge if various weights and types of ammunition are to be used. Most subsonic and supersonic loads, fired from either a suppressed or unsuppressed gun, are compatible with this configuration. However, some subsonic ammunition may not always cycle reliably under adverse conditions or in a severely fouled firearm without a sound suppressor attached to provide extra backpressure.
- Upper Receiver: A3 Flat-Top
- Barrel Length: 16"
- Barrel Contour: Medium
- Barrel Material: 4150 Chrome Moly Vanadium Steel
- Muzzle Thread Pattern: 5/8"-24
- Chrome Lined: No
- Barrel Finish: Black Nitride / Melonite
- Twist Rate: 1 in 7"
- Chamber: 300 AAC Blackout
- M4 Feed Ramps: Yes
- Bolt Carrier: Mil-Spec, Nickel Boron Finish
- Muzzle Device: AAC 51-T Blackout Flash Hider
- Gas System Length: Carbine
- Gas Block Diameter: 0.750"
- Handguard: Knight's Armament URX 3.1 Quad Rail, Free Float
- Sights: None
- Suitable for use with Subsonic or Supersonic loads, either Suppressed or Unsuppressed
- Compatible with all standard AR-15 magazines, including Magpul Pmags (Not Included)
- 5.32 lbs
Please Note: Installation of AR-15 upper assemblies with certain features including, but not limited to: flash hiders, bayonet lugs, and threaded muzzles may violate state and/or local laws.