Description
Mil-Spec (4150) M4 Barrel with QPQ Nitride and Custom, Ultra-Light Handguard.
This ultralight AR-15 barreled upper receiver ships ready to provide MOA accuracy with a hardened mil-spec barrel and the industry’s most protective and accurizing finish, QPQ Nitride. Providing plenty of rail estate in a lightweight configuration is our new, custom-made aluminum M-Lok handguard. This upper comes complete with a quality chrome-lined M16/Full-Auto BCG and charging handle resting inside a mil-spec forged M4 flattop upper.
What’s Included & Specifications
Barrel
• Chamber: 5.56 NATO
• Contour: M4/Government
• Length: 16"
• Twist Rate: 1:7
• Gas System: Carbine
• Gas Port: 0.750
• Thread Pitch: 1/2x28
• Feed Ramps: M4
• Material: 4150 CMVS
• Finish: Black Nitride QPQ
• Process: Button Rifled
• Lining: Black Nitride
• Extension: M4
• Muzzle: A2 “Birdcage” Flash Hider
Handguard
• Attachment System: M-Lok
• Finish: Type III Hardcoat Anodized (Mil-Spec)
• Top Rail: Mil-Spec 1913 Picatinny
• Material: Billet 6061-T6 Aluminum
• Weight: 7.5 oz.
• Inner Diameter: 1.355”
• Barrel Nut: Included
Stripped Upper Receiver
• Profile: M4 Flattop
• Material: 7075-T6 Aluminum
• Finish: Type III Hardcoat Anodized (Mil-Spec)
Bolt Carrier Group
• Profile: M16/Full-Auto
• Steel: Carpenter No. 158 (Mil-Spec)
• Exterior: Phosphate Finish
• Interior: Chrome-Lined
• Gas Key: Chrome-Lined, Staked
• Charging Handle: Included
Shipping Restrictions
Shipping of various parts and/or accessories are prohibited to states and locales (ie New Jersey, California, New York, etc…) with restrictions against certain parts and/or accessories or “assault weapons” (i.e. states with high-capacity magazine restrictions, manufacturing of semi-automatic weapons, etc..). It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. We try our best to keep our shipping page current, but laws change daily
80-Lower.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally.
![[NEW] 5.56 AR 15 Rifle Kit (16″ Nitride Barrel & 13.5″ M-Lok Handguard) w/ 80% Lower – (1:7 Twist)](https://cdn11.bigcommerce.com/s-z44cuhyv4y/images/stencil/300x300/products/1161/7490/5-56-AR-15-Rifle-Kit-forged-lower__89024.1589830828.jpg?c=1 "5.56 AR 15 Rifle Kit (16″ Nitride Barrel & 13.5″ M-Lok Handguard) w/ forged 80% Lower – (1:7 Twist)")
