AR-9 Side Charging Bufferless Pistol Kit – 5″ Parkerized M4 Barrel & Micro Flash Hider, 1:10 Twist Rate w/ 4″ M-LOK Handguard

Description

Everything but the lower for an ultra-compact 9mm AR pistol.

If the goal is the shortest AR-9 you can build, start here. This kit pairs a 5″ bufferless side-charging upper with a complete mil-spec lower parts kit, so the only thing left to supply is the receiver. With no buffer tube hanging off the back and a 4″ M-LOK handguard up front, the finished pistol stays remarkably short, making it a natural fit for a home-defense or truck gun build.

Includes Bufferless End Plate

A sealed end plate closes off the lower’s receiver extension housing so the upper can run without a buffer. Its built-in Picatinny rail accepts a folding stock adapter (for SBR builds only).

Upper Highlights

The 5″ parkerized M4 barrel is button rifled with a 1:10 twist and threaded 1/2×36, finished with a micro flash hider. Up top, the billet flat-top receiver carries a right-side charging handle and a 9mm blowback bolt carrier group.

Lower Compatibility

Built for mil-spec Colt-pattern AR9 80% lowers and retail AR9 lowers. Running it on an AR-15 lower? You’ll need a bufferless conversion tool and a 9mm magwell adapter (such as Stern Defense) to make the swap.

AR-9 Upper Assembly Specs

Barrel

• Chamber: 9mm
• Contour: M4
• Length: 5″
• Twist Rate: 1:10
• Gas System: Blow-back
• Muzzle Threads: 1/2×36
• Feed Ramps: Single
• Material: 4150 CMV
• Finish: Parkerized
• Process: Button Rifled
• Lining: QPQ Nitride
• Extension: M4
• Muzzle: Micro Flash Hider

Handguard

• Attachment System: 4″ M-LOK
• Top Rail: Split Rail / 1913 / Picatinny Rail
• Material: 6061-T6 Billet Aluminum
• Finish: Type III Hardcoat Anodized (Mil-Spec)
• Attachment: Barrel Nut

Upper Receiver

• Profile: A3 Flattop
• Material: Billet Aluminum
• Finish: Type III Hardcoat Anodized (Mil-Spec)
• Charging: Right-Side

Bolt Carrier Group

• Profile: 9mm / Blow-back
• Steel: E9310, HPT/MPI-tested
• Exterior: Black Nitride
• Interior: Parkerized
• Charging Handle: Included, Right-Side Charging

Bufferless Conversion

• End Plate: Sealed, bufferless end plate w/ Picatinny stock adapter rail
• Conversion Parts: Included

Lower Receiver Components Included

• Parts Kit: Mil-Spec AR-15 Lower Parts Kit w/ Single-Stage Trigger & A2 Pistol Grip
• Buffer System: Not required (bufferless end plate included)
• Pistol Brace: Not included

Install Instructions

New to bufferless AR builds? See our step-by-step instructional guide!

Lower receiver not included.