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

(You save $20.00 )


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.

Ultra-light, and hyper-accurate, this upgraded M4-type AR15 build kit is setting a new standard. Tucked under a lightweight free-float M-Lok handguard is a Government-profile barrel forged from mil-spec 4150 Chromoly Vanadium with a 1:8 twist. Throw some 62-grain M193 or 77-grain Match Kings down the muzzle, and you’ll put one hole atop another at 100 yards for sub-MOA performance.

All things remain mil-spec for utter reliability: A forged Picatinny flattop receiver with M4 feed ramps keeps everything cycling smoothly in tandem with an M16 chrome-lined BCG. Carbine gas ensures any loads will cycle quickly and smoothly, and a mil-spec parts kit with Carbine buffer and M4-type buttstock finishes off the kit. Pair it up with an optional billet or forged 80% lower receiver, and you’ll have every part ready for building your AR from scratch.

What’s Included & Specifications


  • Chamber:  5.56 NATO
  • Contour:  M4/Government
  • Length:  16”
  • Twist Rate:  1:8
  • Gas System:  Carbine
  • Gas Port:  0.750”
  • Gas Hole Dia.:  0.070”
  • Muzzle Threads:  1/2x28
  • Feed Ramps:  M4
  • Material:  4150 CMV
  • Finish:  Parkerized
  • Process:  Button Rifled
  • Lining:  None
  • Extension:  M4
  • Muzzle:  A2 “Birdcage” Flash Hider


  • Attachment System:  M-Lok
  • Finish:  Type III Hardcoat Anodized (Mil-Spec)
  • Top Rail:  M1913 Picatinny
  • Material:  Billet 6061-T6 Aluminum
  • Attachment:  Barrel Nut 

Stripped Upper Receiver

  • Profile:  M4 Flattop
  • Material:  Forged 7075-T6 Aluminum
  • Finish:  Type III Hardcoat Anodized (Mil-Spec)

Bolt Carrier Group

  • Profile:  M6/Full-Auto
  • Steel: Carpenter No. 158 (Mil-Spec)
  • Exterior:  Phosphate Coating
  • Interior:  Chrome-Lined
  • Gas Key:  Staked, Chromed
  • Charging Handle:  Included
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.