AR15 Build Kit - 5.56 (16″ Nitride Barrel, 1:7 Twist, & 12″ M-Lok Handguard) with Fire/Safe Marked 80% Lower



Forged 4150 CMV M4 Barrel, Custom Ultra-Light M-Lok Handguard.

We decided to shave serious weight, upgrade accuracy, and lower costs with our new, custom AR-15 barreled upper. This assembly features a quality, 100% mil-spec 4150 CMV barrel with Gov’t profile, treated with a hyper-tough and accurizing QPQ Nitride finish. Superior to chrome lining and phosphate, it affords longer barrel life and more consistent shot groups. Resting outside is a custom billet, ultra-light M-Lok handguard of our own design. Inside you’re also getting a chrome-lined and staked M16 BCG with charging handle. Tying everything together is a mil-spec forged M4 flattop upper.

What’s Included & Specifications


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


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

No FFL required  Made in the USA  Lifetime Warranty

Shipping Restrictions only ships within the United States. Federal legislation dictates we cannot ship our products internationally. 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 (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. We try our best to keep our shipping page current, but laws change daily.

We are a national retailer of individual components and not all products depicted on this website are legal in every state. Shipping of various products found on this website are prohibited to some states (such as California, Connecticut, District of Columbia, New Jersey, New York, Rhode Island, and Washington). The information, pictures, text or products presented on this website are not a representation by us, and should not be understood by you, that any product or completed firearm is legal to assemble or own in your state of residence. We encourage each and every builder to perform their own research about the state and federal laws that apply to them. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative.