With so much “tacti-cool” stuff hitting the black rifle market, there’s nothing wrong with taking a step back and building a truly classic shooter. This Classic AR-15 Build Kit features an old school A2-style upper, complete with an A2 front sight post, A2-style “bird cage” flash hider, and traditional forged M4 flattop upper.
Inside, you’re getting a mil-spec lower parts kit and a chrome-lined M16 bolt carrier group with staked gas key and M4 feed ramps. The 4150 CMV barrel promises MOA accuracy with bomb-proof reliability. A classic M4, six-position buttstock and buffer are included. This upper ships with an optional forged or billet 80% lower to complete your kit. Upper ships test-fired. Kit comes with Lifetime Warranty.
Barrel Features & Specs:
- Barrel Length: 16”
- Gas System: Mid-Length
- Barrel Profile: A2
- Barrel Steel: 4150 CMV
- Barrel Finish: Melonite
- Chrome Lining: None
- Muzzle Thread: ½-28
- Chamber: 5.56 NATO
- Twist Rate: 1:7
- Barrel Extension: M4
- Diameter at Gas Block: .750
- Gas Block Type: F-Marked FSB
- Muzzle Device: A2 Style Flash Hider
Upper Receiver Features & Specs:
- Receiver Material: Forged 7075 T6
- Receiver Type: Flattop M4
- Handguard Type: A2/Heat Dissipator Style
- Bolt Carrier Group Included: Yes
- Bolt Steel: 9130
- Bolt Carrier Profile: Full-Auto (M16)
- Charging Handle Included: Yes
Build Kit Benefits
- 100% legal to own and ship to your front door
- Not considered a firearm – no FFL paperwork needed!
- 4150 CMV barrel and Classic LPK provides MOA accuracy
- Prebuilt upper with gas system removes the guesswork of assembly
- Includes optional forged or billet 80% lower receiver
AR 15 Rifle Kit Details (Expanded):
Barrel: 16″ mid-length, 4150 CMV steel with black Melonite finish, chambered in 5.56 NATO, 1:7 twist rate, classic A2 front sight post/gas block, mid-length A2 handguard, 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. Chrome-lined, includes extractor spring and O-ring insert. 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, mil-spec, made from 6061 T6 aluminum.
Please note: This build kit requires that the builder complete the optional 80% lower receiver, 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)!
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.