Want the most affordable, quality mil-spec AR kit? Love the classic look of a service-issued M4 Carbine? Go for full authenticity and save a ton of cash with this cosmetically “blemished” A2-style build kit. Your black rifle will get dents and dings at the first range day, anyway.

Even with a minor scratch on the receiver or a tiny nick in the handguard, nothing prevents this reliable shooter from performing with any 5.56 or .223 loads you slam through the barrel. Everything about this kit screams “mil-spec”, including the phosphated M4-profile barrel, minus the upgraded BCG. The bolt carrier group sports a heat-treated 9310 bolt with a nitride QPQ treatment that provides the same heat and corrosion protection as chrome lining and phosphate, while also providing a “slicker” action that requires less lubrication.

Barrel Features & Specs:

• Barrel Length: 16”
• Gas System: Carbine
• Barrel Profile: Government
• Steel: 4150 CMV
• Barrel Finish: Phosphate
• Chrome Lining: No
• Muzzle Thread: ½-28
• Chamber: 5.56 NATO
• Twist Rate: 1:8
• Barrel Extension: M4 Feed Ramps
• Diameter at Gas Block: .750
• Gas Block Type: F-Marked FSB
• Muzzle Device: A2 Flash Hider

Upper Receiver Features & Specs:

• Receiver Material: Forged 7075-T6
• Receiver Type: Flattop M4
• Handguard Type: A2/Heat Dissipator
• Bolt Carrier Group Included: Yes
• Bolt Steel: Heat-treate9130
• 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 ships ready to fire (test-fired for reliability)

AR 15 Rifle Kit Details (Expanded):

Barrel: 16″ mid-length, 4150 CMV steel with mil-spec Phosphate coating, chambered in 5.56 NATO, 1:8 twist rate, classic A2 front sight post/gas block, carbine A2 handguard, A2 “birdcage” flash hider.Upper Receiver Assembly: Forged from 7075 T6 aluminum, Type III hard-coat anodized in black for durability. Features M4 feed ramps, made in the USA.

Bolt Carrier Group: The carrier is made from mil-spec 8620 while the bolt is made from heat-treated 9310 steel. Staked gas key with Grade-8 fasteners and black nitride finish. Includes extractor spring and O-ring insert. High-pressure tested (HPT) and magnetic particle inspected (MPI).

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)!