Krawl w/BTR Brace 10.5-inch 1:10 9MM AR-9 Freefloat Quad-Rail Pistol Full Build Kit

Krawl Magpul BTR Brace 10.5-inch 1:10 9mm AR-9 Freefloat Quad Rail Pistol Full Build Kit

The Krawl is a 9mm AR-9 Full Build Kit built around a compact 10.5-inch direct blowback platform. The kit centers on a 10.5-inch medium profile 4150 CrMoV steel barrel with a nitride finish, 1:10 twist rate, and 1/2x36 thread pitch, paired with a Steel Flash Can Design 11 in black oxide and a black 1/2-inch crush washer. The Vertex Enhanced billet AR-15 pistol caliber upper receiver in black is paired with a 10-inch freefloat quad rail handguard in anodized black 6061-T6 aluminum. A complete 9mm nitride bolt carrier group in 8620 alloy steel with an external extractor compatible with Glock and Colt pattern magazines, and a Mil-Spec AR-15 M4 charging handle complete the upper side. The lower hardware includes a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position aluminum carbine buffer tube, an AR-15 9mm carbine buffer, a USA-made standard AR-15 carbine recoil spring, a Mil-Spec AR-15 M16 receiver end plate, and an AR-15 carbine castle nut. The Magpul BTR pistol brace in black, compatible with standard Mil-Spec buffer tubes, is included. Lower receiver not included.

Key Features

• 10.5-inch medium profile 4150 CrMoV steel barrel, nitride finish, 1:10 twist, 1/2x36 thread pitch, 9mm
• Direct blowback platform
• Steel Flash Can Design 11, black oxide finish, 1/2x36, black 1/2-inch crush washer included
• Vertex Enhanced billet AR-15 pistol caliber upper receiver, black
• 10-inch freefloat quad rail handguard, 6061-T6 aluminum, anodized black, barrel nut attachment
• Complete 9mm nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern magazine compatible
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty 6-position aluminum carbine buffer tube
• AR-15 9mm carbine buffer
• Standard AR-15 carbine recoil spring, made in USA
• Mil-Spec AR-15 M16 receiver end plate
• AR-15 carbine castle nut
• Magpul BTR pistol brace, black, Mil-Spec buffer tube compatible

Perfect For

• AR-9 pistol builders sourcing a complete 9mm blowback full build kit with a Vertex Enhanced billet AR-15 pistol caliber upper receiver, 10.5-inch nitride 4150 CrMoV barrel, Steel Flash Can Design 11, 10-inch freefloat quad rail handguard in anodized black 6061-T6 aluminum, nitride BCG compatible with Glock and Colt pattern magazines, and Magpul BTR brace on a Mil-Spec carbine buffer tube already included, pairing it with their own lower receiver
• Shooters building a compact 10.5-inch 9mm direct blowback AR-9 pistol platform who want the AR-9 BCG, charging handle, complete lower parts kit, and Magpul BTR brace covered in one kit with a Vertex Enhanced billet pistol caliber upper receiver and freefloat quad rail handguard
• AR-9 PCC pistol builders who want a complete blowback full build kit with a Glock and Colt pattern magazine compatible BCG and a 10-inch freefloat quad rail handguard with a Magpul BTR brace without sourcing components separately

Barrel and Muzzle Device

The 10.5-inch medium profile barrel is chambered in 9mm and constructed from 4150 CrMoV steel with a nitride finish. The twist rate is 1:10 and the thread pitch is 1/2x36, which matches the included Steel Flash Can Design 11 in black oxide. A black 1/2-inch crush washer is included. The direct blowback platform design addresses the 9mm cartridge in an AR-9 pistol caliber build without a gas system.

Upper Receiver and Handguard

The Vertex Enhanced billet AR-15 pistol caliber upper receiver carries a black finish and is designed around the AR-9 pistol caliber platform. The 10-inch freefloat quad rail handguard is 6061-T6 aluminum with an anodized black finish, a barrel nut attachment design, and full-length Picatinny rail sections along all four sides for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-9 pistol platform.

Bolt Carrier Group and Charging Handle

The complete 9mm nitride bolt carrier group is 8620 alloy steel with a nitride finish and features an external extractor compatible with both Glock and Colt pattern magazines. A Mil-Spec AR-15 M4 charging handle is included to complete the upper component set.

Lower Parts Kit and Buffer System

The complete Mil-Spec AR-15 lower parts kit covers the internal lower receiver components. The buffer system includes a Mil-Spec heavy-duty 6-position aluminum carbine buffer tube, an AR-15 9mm carbine buffer, a USA-made standard AR-15 carbine recoil spring, a Mil-Spec AR-15 M16 receiver end plate, and an AR-15 carbine castle nut. The Magpul BTR pistol brace in black pairs with the included Mil-Spec carbine buffer tube and covers the rear brace interface for this AR-9 pistol lower build kit.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify local and state laws regarding pistol brace use and classification. Verify compatibility with your specific 9mm AR-9 lower receiver and magazine pattern before use.