CMMG AR-15 M4 LE A3 Upper Receiver Assembly 5.56x45mm NATO 16" Barrel
This complete CMMG AR-15 M4 LE Upper Assembly features a chrome-moly steel barrel with a WASP Melonite treated bore and exterior. M4 feed ramps ensure reliable feeding and the 5.56x45mm NATO chamber allows the use of both commercial or surplus mil-spec ammunition.
CMMG's durable salt bath nitride finish is a unique protective coating applied to the barrel that surface-hardens the metal, extending barrel service life by reducing friction in the bore and lessening bore surface wear. 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 the benefits of traditional chrome lining without suffering from the accuracy degradation commonly encountered due to uneven application of chrome inside the barrel's bore.
- Upper Receiver: A3 Flat-Top
- Barrel Length: 16"
- Barrel Contour: M4
- Barrel Material: Chrome Moly Steel
- Muzzle Thread Pattern: 1/2"-28
- Chrome Lined: No
- Barrel Finish: Salt Bath Nitride
- Twist Rate: 1 in 7"
- Chamber: 5.56x45mm NATO
- M4 Feed Ramps: Yes
- Muzzle Device: A2 Flash Hider
- Gas System Length: Carbine
- Gas Block Diameter: 0.750"
- Handguard: Polymer M4-Style
- Sights: Mil Spec A2 "F" Marked Front, No Rear
- Bolt Carrier Assembly Included: Yes
- Bolt Carrier Type: Mil-Spec
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.
The total weight of the product, including the product’s packaging as it sits on our shelf. Since some products ship directly from the Manufacturer, their weight may be unavailable. Because of variations in the manufacturing process, similar products may have differing weights. Unless the product is designated as “Ships Alone”, Shipping Weight does not include the shipping box or packing materials associated with your order.
Product ships from MidwayUSA, separate from any other products on your order due to its size. Products that are Shipped Alone incur separate "Per Order" and "Per Pound" shipping charges.
Product is regulated by the US Department of Transportation (DOT) and cannot be shipped via USPS or air shipping methods. DOT-Regulated products must ship UPS Ground.
Product is restricted by shipping carriers and cannot be shipped to certain locations or via certain shipping methods.
Additional shipping charge for HazMat products. Carriers charge extra to ship packages with products they consider hazardous, such as reloading powder and primers.
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