CMMG AR-15 M4 LE A3 Upper Receiver Assembly 300 AAC Blackout 16" Barrel Single Rail Gas Block
The Chrome Moly Steel Barrel is finished inside and out with a Salt Bath Nitride finish. The SBN process surface-hardens the metal, extending barrel service life by reducing friction in the bore and lessening bore surface wear. Also referred to as Salt Bath Nitriding, this treatment produces an extremely hard, slick surface on steel that resists carbon adhesion and increases corrosion resistance, making for easier cleaning and maintenance. Nitriding converts the steel's surface without any build-up, retaining all of the benefits of traditional chrome lining without suffering the accuracy degradation commonly encountered due to uneven application of chrome inside the barrel's bore.
This 16" 300 AAC 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: 4140 Chrome Moly Steel
- Muzzle Thread Pattern: 5/8"-24
- Chrome Lined: No
- Barrel Finish: Salt Bath Nitride
- Twist Rate: 1 in 7"
- Weight: 4.25 lbs
- Chamber: 300 AAC Blackout
- M4 Feed Ramps: Yes
- Muzzle Device: A2 Flash Hider
- Gas System Length: Carbine
- Gas Block Diameter: 0.750"
- Handguard: Polymer M4-Style
- Sights: None, Receiver Height Single Rail Gas Block
- Bolt Carrier Assembly Included: Yes
- Bolt Carrier Type: Mil-Spec
- Suitable for use with Subsonic or Supersonic loads, either Suppressed or Unsuppressed
- Compatible with all standard AR-15 magazines (including Pmags), No Magazine Included
NOTE: All CMMG uppers are test fired at their facility before shipment to the end user.
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.
Thank you! Your valuable input helps improve our product information and future product selections
Magpul PMAG M2 MOE Magazine AR-15 223 Remington 30-Round...
$12.30 - $13.25
DPMS AR-15 Takedown Pin Punch Delrin...
Lee Pacesetter 3-Die Set 300 AAC Blackout...
Sierra Matchking Bullets 300 AAC Blackout (308 Diameter) 125...
$39.49 - $180.99
Hornady Reloading Brass 300 AAC Blackout Box of 50...
$31.49Sale Save $3.50 (10%)
Schuster Gas Tube Pin Punch AR-15, LR-308 Steel...
LANTAC Dragon 7.62 Muzzle Brake 5/8"-24 Thread LR-308, AR-10...
Rainier LeadSafe Bullets 9mm (355 Diameter) 115 Grain Plated...
$12.79 - $96.99
Fiocchi Shooting Dynamics Ammunition 300 AAC Blackout 150...
$36.99 - $359.99
MagPul MBUS Gen 2 Flip-Up Front Sight Handguard Height AR-15...
MagPul MBUS Gen 2 Flip-Up Rear Sight AR-15 Polymer...
Noveske AR-15 Rogue Hunter A3 Upper Receiver Assembly 300 AAC...
Advanced Armament Co (AAC) AR-15 A3 Upper Receiver Assembly...
Noveske AR-15 Light Recce Basic A3 Upper Receiver Assembly 300...
Olympic Arms AR-15 A3 Upper Receiver Assembly 300 AAC Blackout...
CMMG AR-15 M4 LE A3 Upper Receiver Assembly 300 AAC Blackout...