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AR9 Side Charging Rifle Kit - 16" Black Nitride M4 Barrel, 1:10 Twist Rate with 15" MLOK Handguard

Usually ships the same day or the next business day!

One of the most versatile calibers in the world in rifle form!

You can make your 9mm ammo do more for you with this AR-9 side-charging rifle kit. This full-sized AR-15 length rifle has been chambered and built to share ammo from your 9mm sidearm, which means you can push it further and more accurate than you could with your pistol. Its left-side-charging functionality means you never have to take your firing hand off your grip. It also features a 15" MLOK handguard, so you can attach the widest range of foregrips, tactical lights and lasers, or anything else that employs the MLOK mounting system.

All the internals, the BCG and lower parts kit, have been designed to function with any 9mm lower receiver as well, or even an 80% 9mm lower.

What’s Included

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

AR-9 Rifle Kit Specs


  • Chamber: 9mm Parabellum
  • Contour: Straight-cut
  • Length: 16”
  • Twist Rate: 1:10
  • Gas System: Blowback
  • Muzzle Threads: 1/2x28
  • Material: 4150 CMV
  • Finish: Nitride
  • Process: Button Rifled
  • Muzzle: Twisted "birdcage" A2 flash hider


  • Attachment System: 15" Lightweight M-Lok
  • Finish: Type III Hardcoat Anodized (Mil-Spec)
  • Top Rail: M1913 Picatinny
  • Material: Billet 6061-T6 Aluminum
  • Attachment: Barrel Nut 

Upper Receiver

  • Profile: M4 Flattop
  • Material: Forged 7075-T6 Aluminum
  • Finish: Type III Hardcoat Anodized (Mil-Spec)

Bolt Carrier Group

  • Profile: 9mm
  • Steel: Carpenter No. 158 (Mil-Spec)
  • Exterior: Black Nitride
  • Interior: Black Nitride
  • Gas Key: Staked
  • Charging Handle: Left-side-charging, attached/included

Lower Receiver Parts

  • Buffer System: 9mm Buffer
  • Buttstock: Magpul CTR
  • Parts Kit: Mil-spec, single-stage

Lower receiver not included.

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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.