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5.56 AR 15 Rifle Kit - 16″ Stainless Barrel, 1:8 Twist Rate with 13.5″ M-Lok Handguard



Guaranteed sub-MOA accuracy with an ultralight M-Lok handguard.

What more could you ask for? At this price, we’re excited to introduce our new AR build kit with a 416R stainless, match-grade barreled AR-15 upper assembly, completed with a 13.5" M-Lok free-floating handguard. Sporting a Crucible steel barrel with a sub-MOA guarantee, this upper provides the utmost level of accuracy in a compact, easy-to-carry profile. It ships assembled with a flattop M4 (forged) upper receiver and properly staked, chrome-lined M16 BCG with charging handle. Performance and price in a featherweight package that simply can’t be beat.

What’s Included & Specifications


Chamber: 5.56 NATO
Contour: M4/Government
Weight: 1.50 lbs.
Length: 16"
Twist Rate: 1:8
Gas System: Carbine
Gas Port: 0.750”
Gas Hole Dia.: 0.072”
Thread Pitch: 1/2x28
Feed Ramps: M4
Material: 416R Crucible Stainless
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: 8.6 oz.
Length: 13.5”
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

Made in the USA Lifetime Warranty

Shipping Restrictions

AR-15Lowerreceivers.com 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, Hawaii, 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.