Rifle Kit - 5.56mm NATO (16" Parkerized Barrel & 15" MLOK Handguard) w/ 80% Lower (1:8 Twist)



Please Note: Given the current demand for this product and supply shortages, your order may ship with a black hammer and trigger or a stainless steel hammer and trigger.

Get up and running black rifle-style with this AR-15 build kit. And sure, you could go buy one, but then how will you be able to brag you built it yourself? We got ya covered on both fronts.

This AR-15 build kit comes to you with an upper assembly that's been prebuilt to make your life easier. It's got a 16" parkerized barrel with a 15" free floating M-Lok handguard. Just add your favorite backup sights or optics of your choice. Finally, you choose between our forged or billet lowers, or you can opt to receive no lower if you already have one in mind. You supply the mags and ammo, and mount either optics or backup sights of your choice, and we'll supply the awesome.


  • Gas System: Carbine-length
  • Barrel Profile: M4
  • Barrel Steel: 4150 CMV Steel
  • Barrel Finish: Parkerization
  • Chrome Lining: No
  • Muzzle Thread: 1/2x28
  • Chamber: 5.56mm NATO
  • Twist Rate: 1:8
  • Barrel Extension: M4
  • Gas Block Size: .750
  • Gas Block Type: Low-profile
  • Muzzle Device: A2 Flash hider
  • Receiver Material: Forged 7075 T6
  • Receiver Type: M4
  • Handguard Type: M-Lok free float
  • Bolt Carrier Group Included: Yes
  • Bolt Steel: 9310 steel, magnetic particle inspected
  • Bolt Carrier Profile: Full-auto
  • Charging Handle Included: Yes

Benefits of the Carbine-Length Black-Barreled AR 15 Rifle Kit:

  • 100% legal to own and ship to your front door
  • Not considered a firearm – no FFL paperwork needed!
  • Chrome moly vanadium steel barrel and Freedom parts kit ensure sub-MOA accuracy
  • Prebuilt upper with gas system removes the guesswork of rifle making
  • Includes bolt carrier group, free-floated M-Lok handguard and lower parts kit

AR 15 Rifle Kit Details (Expanded):

Barrel: carbine-length with parkerized finish, chambered in 5.56mm NATO, 1:8 twist rate, .750 low-profile gas block, 15” free-float M-Lok handguard, with an A2 birdcage flash hider.

Upper Receiver Assembly: Forged from 7075 T6 aluminum, hard-coat anodized in black for durability, features M4 feed ramps, and are made in the USA.

Bolt Carrier Group: The bolt carrier is made from 9310 steel and has a staked gas key and black nitride finish. The bolt itself comes complete with an extractor spring and O-ring insert. It accepts .223 Remington, 5.56 NATO, and .300 BLK calibers (though you should NEVER attempt to use a caliber for which your rifle is not chambered), and is magnetic particle inspected.

80% Lower Receiver: Choose to receive a forged or billet Fire/Safe 80% lower receiver. Our lower receivers are anodized to match the upper receiver perfectly. and they come ready for machining of the trigger pocket and drilling of the safety selector and trigger pin holes.

AR-15 Lower Parts Kit: includes all parts needed to complete the lower receiver including pistol grip, mil-spec safety selector, and trigger/fire control group.

Lower Assembly: comes with complete buffer tube assembly including buffer, buffer spring, six-position buffer tube, latch plate, castle nut, and butt stock based on original Colt design.

Charging Handle: standard size, made from 6061 aluminum.

Please note: This build kit requires that the builder complete the 80% lower receiver themselves, but that’s the rewarding part of the experience (and the only way to build your own AR-15 without the need of an FFL transfer or serialization).

No FFL required  Made in the USA  Lifetime Warranty

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.

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.