REAL TIME INVENTORY. NO BACKORDERS. Ships within 1 - 3 Business Days!

5.56 AR 15 Rifle Kit - 16" Phosphate Barrel, 1:8 Twist Rate with Classic A2 Handguard - Blem

Was: $599.99
Now: $399.99
Out of Stock
  • Fast Shipping

  • Thousands of Reviews

  • 7 Day Customer Service

  • Amazing Selection

Guns are getting more expensive, and affordability is always a good thing. Affordable and high-quality in a mil-spec AR build kit is even more desireable. And if you're going for the classic look of a service-issued M4 Carbine, then reach for this rtifle kit and save a ton of cash with this cosmetically “blemished” A2-style build kit. Your black rifle is a workhorse and will eventually get dents and dings at the range, anyway.

Even a minor scratch on the receiver or a tiny nick in the handguard won't prevent this reliable AR from performing with any 5.56 or .223 loads you can sling. Everything about this kit says "mil-spec," including the phosphated M4-profile barrel minus the upgraded BCG, but that's thrown in to give you better performance. The bolt carrier group is a heat-treated 9310 bolt with a QPQ nitride treatment that provides the same resistance to heat and protection from corrosion as chrome lining and phosphate, while also providing a "slicker" action that requires less lubrication.

What’s Included 

This kit is not a firearm. It includes an assembled upper receiver, lower parts kit, and buffer assembly with buttstock. 

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

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, chrome-lined 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 Components: Comes with complete buffer tube assembly including buffer, buffer spring, six-position buffer tube, latch plate, castle nut, and buttstock based on original Colt M4 design.

Charging Handle: Standard, mil-spec, made from 6061 T6 aluminum.

Lower receiver sold separately.

Shipping Restrictions  

We cannot ship certain parts and accessories to states that prohibit the sale or ownership of such components, like California, New York, and others. Before ordering, see our shipping restrictions for a list of all prohibited states and locales. We try our best to keep our shipping restrictions current, but state laws change almost daily. It is your responsibility to be aware of your local firearms laws before purchasing from our website or machining a firearm. only ships within the United States. Federal law prevents international shipments of our products.  

WARNING: Handling firearms parts and certain firearm accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information, visit 

WARNING: Handling firearms parts and accessories can expose you to lead and other petroleum products known to the State of California to cause cancer and reproductive harm. For more information go to:

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. only ships within the United States. Federal legislation dictates we cannot ship our products internationally.

Barrel Size:
Barrel Finish:
Twist Rate:

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, Hawaii, 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.