5.56mm NATO AR 15 Rifle Kit (16" Stainless Barrel & 12" M-Lok Handguard) w/ 80% Lower (1:7 Twist)



Put some ultra-style in your AR experience.  Sure, lots of us love the black rifle life.  But if you can have that same hobby or passion and throw in a little style too, then why not?  Check out this build kit featuring a blindingly lustrous stainless steel barrel and matching muzzle brake.  Now, there's no reason you can't love shooting AR rifles and have yours look badass at the same time.

This kit comes with all necessary parts you need.  The flat-topped upper assembly comes ready for whatever backup sights or optics you choose.  This kit also features a mid-length gas system to its barrel.  Get away from buzz words like "mil-spec."  While going mil-spec on everything guarantees functionality, carbine gas systems pack a punch.  This mid-length gas system comes perfectly tuned for the 16" stainless barrel, which translates into even less recoil, but with the same reliability and the added benefit of more accuracy, because that's what this 416R stainless barrel-equipped kit is all about.  Dare to be bold and stand out with this kit.  Just be sure to bring lots of napkins to the range with you, so all the guys who settle for "mil-spec" can wipe the drool from their mouths when they see your AR.


Gas System: Mid-length
Barrel Profile: Lightweight
Barrel Steel: 416R
Barrel Finish: Stainless
Chrome Lining: No
Muzzle Thread: 1/2×28
Chamber: 5.56mm NATO
Twist Rate: 1:7
Barrel Extension: M4
Gas Block Size: .750″
Gas Block Type: Low-profile
Muzzle Device: Stainless muzzle brake
Receiver Material: Forged 7075 T6
Receiver Type: M4 Flat Top
Handguard Type: 12″ M-Lok
Bolt Carrier Group Included: Yes
Bolt Steel: 9310 steel, magnetic particle inspected
Bolt Carrier Profile: Full-auto
Charging Handle Included: Yes
Overall Length: 24.5″

Benefits of the 16” 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!
  • 416R 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: 16″ mid-length with stainless finish, chambered in 5.56mm NATO, 1:7 twist rate, .750″ low-profile gas block, 12″ M-Lok handguard, with a stainless steel muzzle brake.

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 .300BLK 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, New Jersey, New York, Pennsylvania, 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.