Tired of the tactical overload? Build an old-school M4A2 forgery with this AR-15 “A2” Build Kit. It features a Classic flattop upper with a cold-hammer forged, 4150 CMV barrel – the best of the best, MOA accuracy. Out front, an O.G. A2 front sight post, drop-in A2 handguard and A2 “birdcage” flash hider handle the business end.
An M16 BCG goes to work with M4 feed ramps inside, and a Classic Lower Parts Kit ensures your trigger breaks clean with little creep or take-up. An original M4, six-position buttstock and buffer tops off the whole kit. Grab an optional 80% lower to complete your rifle and hit the range in a single afternoon!
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)!
AR-15Lowerreceivers.com only ships within the United States. Federal legislation dictates we cannot ship our products internationally. 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 (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. We try our best to keep our shipping page current, but laws change daily.