Product Code: 5D-AR916CBK

Complete 16" AR-9 80% Build Kit



Muzzle Device
Current Stock:

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Our Complete AR-9 80 Lower Build Kit contains all of the parts necessary to build your AR-9 at home with multiple otpions available to customize your Pistol Caliber Carbine!


  • Slick Side Billet AR-9 Upper Kit Receiver with Last Round Bolt Hold Open (LRBHO)
  • Billet 6061-T6 Ar-9 80% Lower - Glock Style Mags
  • 16" Parkerized 9mm Barrel with 1:10 Twist Rate
  • Black Nitride 9mm Bolt Carrier Group
  • Standard AR-15 Charging Handle
  • Mil-Spec Stock
  • 5D Tactical 7.5oz 6-Position Carbine Buffer Tube Kit
  • AR-9 Lower Parts Kit


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


A2 Style Flash Hider or Compact Muzzle Brake? While mostly a matter of looks or preference, some states have outlawed A2 Style Flash Hifers or consider them to be "evil features," contributing to what can be considered as an "assault rifle" under the definition of certain states' laws. 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 gasses exiting the barrel in a way that reduces recoil and muzzle rise which helps to improve follow-up shot accuracy. 


For our complete AR-9 80% build kit, the 12" M-LOK handguard offers flexibility when it comes to rail accessories, flip-up sights, and stable stationary shooting. Our M-LOK handguards offer both picatinny and M-LOK attachment sections on the top rail. M-LOK refers to the rail mounting system, which has been proven to be superior to Keymod rails through independent testing!

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.