AR9 Pistol Kit – 7.5″ Parkerized Heavy Barrel, 1:10 Twist, 6.5″ MLOK Handguard

An all-in-one kit for building the perfect AR9.
Featuring a heavy-profile 7.5″ barrel, custom billet upper with right-side charging handle, and a free-float M-LOK handguard, this AR9 build kit’s the key to assembling a high-performance 9mm AR-15 pistol with one, convenient order.
we’ve taken out all the guesswork, picking and pairing the perfect components that ensure a reliable, accuracy build. Just grab a stripped lower, and put it together.
What’s Included
This is not a firearm. It includes an assembled upper receiver, bolt carrier group, charging handle, lower parts kit, and buffer assembly with pistol brace.
9mm Pistol Upper Assembly Specs
Barreled uppers are assembled in-house before shipment.
Barrel

Chamber: 9mm Parabellum
Contour: Heavy
Length: 7.5”
Twist Rate: 1:10
Gas System: Blowback
Muzzle Threads: 1/2 x 36
Feed Ramps: 9mm
Material: 4150 CMV
Finish: Parkerized
Process: Button Rifled
Lining: None
Extension: 9mm
Muzzle: “Twisted” Flash Hider

Handguard

Attachment System: 6.5″ 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: Billet 6061-T6 Aluminum
Finish: Type III Hardcoat Anodized (Mil-Spec)

Bolt Carrier Group

Profile: 9mm
Steel: AISI E9310
Exterior: Black Nitride
Interior: Black Nitride
Charging Handle: Included, Right-Side Charging

Lower Receiver Parts

Buffer System: 9mm
Pistol Brace: SBA3 5-Position
Parts Kit: 9mm w/ Single Stage Trigger

Lower receiver not included. Requires AR9 lower, or AR-15 lower with 9mm conversion block.

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: www.P65Warnings.ca.gov

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.

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