Ultimate Premium AR 15 Rifle Kit - .223 Wylde (16" Stainless Barrel w/ 13.5" M-Lok handguard & 1:7 Twist) w/ 80% Lower



At first, we pulled out all the stops with this kit.  Then our boss was like, "nope, that's too many stops, put some stops back in."  So, next we tried adding all the bells and whistles to the kit.  Then our boss was like, "nope, take off either the bells or the whistles."  So we did what any responsible people would do.  We pulled out all the stops and added the damn bells and whistles anyway.  Just don't tell our boss. So with this kit, you get enough parts to build a fully functioning AR-15, including a prebuilt upper assembly with a 16" stainless steel barrel and a 13.5" M-Lok handguard.  But you also get a few "upgrades." 

First, you get a Magpul MOE grip and trigger guard in your LPK instead of the standard A2 grip.  You also get a set of Magpul MBUS backup sights and a Magpul Angled Foregrip.  On top of that, we threw in a one-point tactical rifle sling, a set of roll pin punches for building your lower assembly, an armorer's wrench, and a whole freaking tactical rifle case with pluck-n-peel inserts so you can customize it to fit your AR or whatever you wanna haul around in it.  Whew.  And breathe.


Gas System: Carbine-length

Barrel Profile: M4

Barrel Steel: 416R

Barrel Finish: Stainless

Chrome Lining: No

Muzzle Thread: 1/2×28

Chamber: .223 Wylde (accepts both .223 and 5.56mm)

Twist Rate: 1:7

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: 13.5” lightweight 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

Overall Length: 24.5″

Premium Accessories:

  • Magpul MBus Front & Rear Flip-up Sights
  • Magpul Angled Foregrip
  • Magpul Premium Pistol Grip
  • Magpul Enhanced Trigger Guard
  • Mil-Spec Buffer Tube and Stock Kit
  • Tactical Rifle Sling (black)
  • Rugged Tactical Rifle Case (with customizable foam inserts)

Tools Included

  • Armorer’s Wrench
  • Pin Punch Set

Benefits of the 16” Carbine-Length Stainless Steel-Barreled AR 15 Rifle Kit:

  • 100% legal to own and ship to your front door
  • Not considered a firearm – no FFL paperwork needed!
  • 416R stainless 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″ carbine-length with stainless steel finish, chambered in .223 Wylde, 1:7 twist rate, .750″ low-profile gas block, 13.5” 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 Wylde, 5.56mm, 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.