Product Code: 5D-76239CBK

Complete 16" 7.62x39 AR-15 80% Build Kit


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Muzzle Device
MBUS Sights
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This kit contains all of the necessary high-quality parts to build your chambered 7.62x39 AR lower at home! We removed all the guesswork and packaged the necessary 7.62 x 39 AR parts to build your 7.62x39 in one complete 80% build kit. There are handguard options available, allowing you to customize the look and performance of your rifle. Buy as a complete kit and save money versus purchasing the necessary items separately!

7.62x39 80% Build Kit Features:

  • 16" AR-15 Upper Receiver - Select Barrel and Handguard Options Above!
  • Black Nitride 7.62x39 Bolt Carrier Group
  • Standard AR-15 Charging Handle
  • Mil-Spec Stock
  • 6-Position Carbine Buffer Tube Kit
  • Forged 7075-T6 AR-15 80% Lower Receiver
  • Mil-Spec AR-15 Lower Parts Kit

About the 7.62x39 AR Upper kit:


The barrel available in this kit is a 16" length 4150 Chrome Moly Steel heavy barrel, with a 1:10 twist rate and carbine length gas system. The Mil-Spec Parkerized coating provides excellent corrosion resistance and an attractive satin-black finish.

Why 7.62x39?

A common question, with a simple answer. Surplus 7.62x39 ammunition is cheap! This round is a 5D Tactical staff favorite, it packs a ton of punch, yet has a very light recoil for hours of enjoyable shooting. With the rounds being so cheap as compared to even 5.56 NATO, there's no guilt in sending a few mag dumps down range! Speaking of mags, in testing we had good luck with C-Products brand magazines.

Muzzle Device

A2 Style Flash Hider or Compact Muzzle Brake? While mostly a matter of looks or preference, some states have outlawed A2 Style Flash Hiders or consider them to be "evil features", contributing toward what may or may not be considered an "assault rifle" under the definition of state law. Be sure to read and understand your local laws.

Aside from the legality, there are benefits in looks and performance when choosing a Compact Muzzle Brake. Muzzle brakes, besides looking cool, divert the gases exiting the barrel in such a way that reduces recoil and muzzle rise, and can improve follow-up shot accuracy.


When it comes to choosing a handguard for your new rifle, there is a delicate balance of form and function. For starters, our M4 Style Handguard with exposed gas block is lightweight, budget-friendly, and perfect for those adding a receiver-top optic or who plan to later upgrade to a free-float handguard design. Our bold looking free-float 12" KM-LOK handguards are lightweight, durable, and can accept a number of M-LOK rail accessories.

The 15" M-LOK handguard offers full-length coverage and can allow for the most flexibility when it comes to rail accessories, flip-up sights, and stable stationary shooting. Our free-float handguard options in 12" and 15" have split Picatinny rail sections combined with M-LOK rail slots on the top of the hanguard. In addition to looking great, this design saves weight versus a full Picatinny rail!

Don't forget to add one of our 80% Lower Jigs, the fastest and easiest way to finish your 80% Lower at home!

Shipping Restrictions: 

This item is restricted from shipping to the following: California, Colorado, Connecticut, Hawaii, Illinois, Maryland, Nevada, New Jersey, New York, Oregon, Philadelphia Pennsylvania, Rhode Island, Washington, Washington D.C.

Under California law, this product is or contains an unserialized “firearm precursor part” and cannot be sold into the State of California. 5D Tactical cannot accept any orders of this product for shipment to the State of California, or to any customer who is a resident of the State of California.