Davidson Defense Pappenheimer 16-inch 1:10 9mm (9x19) AR-9 Freefloat M-Lok Handguard Rifle Full Build Kit

Pappenheimer 16-inch 1:10 9mm AR-9 Freefloat M-LOK Handguard Rifle Full Build Kit

The Pappenheimer is a 9mm AR-9 Full Build Kit built around a 16-inch direct blowback platform. The kit centers on a 16-inch M4 profile 416R stainless steel barrel with a 1:10 twist rate and 1/2x36 thread pitch, paired with a black oxide steel Flash Can Design 11 Rev 2 Pattern 2 muzzle device and a black crush washer. The 6061 billet aluminum upper receiver carries a black finish, paired with a 15-inch freefloat M-LOK handguard in black with a partial Picatinny top rail. A complete 9mm PCC nitride bolt carrier group in 8620 alloy steel with an external extractor compatible with Glock and Colt pattern 9mm 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 with a fire control group and an A2 grip in black, a heavy-duty 6-position black aluminum Mil-Spec carbine buffer tube, a 9mm carbine buffer, a USA-made standard carbine recoil spring, a Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The AR-15 Ranger adjustable A-frame stock in black with integrated QD sling mounts, compatible with Mil-Spec carbine buffer tubes, is included. Lower receiver not included.

Key Features

• 16-inch M4 profile 416R stainless steel barrel, 1:10 twist, 1/2x36 thread pitch, 9mm
• Direct blowback platform
• Flash Can Design 11 Rev 2 Pattern 2 muzzle device, black oxide steel, 1/2x36, black crush washer included
• 6061 billet aluminum upper receiver, black finish
• 15-inch freefloat M-LOK handguard, black, partial Picatinny top rail
• Complete 9mm PCC nitride bolt carrier group, 8620 alloy steel, external extractor, Glock and Colt pattern 9mm magazine compatible
• Mil-Spec AR-15 M4 charging handle
• Complete Mil-Spec AR-15 lower parts kit with fire control group, A2 grip, black
• Heavy-duty 6-position black aluminum Mil-Spec carbine buffer tube
• 9mm carbine buffer
• Standard carbine recoil spring, made in USA
• Mil-Spec receiver end plate
• AR-15 carbine castle nut
• AR-15 Ranger adjustable A-frame stock, black, integrated QD sling mounts, Mil-Spec carbine buffer tube compatible

Perfect For

• AR-9 rifle builders sourcing a complete 9mm blowback full build kit with a 6061 billet upper receiver, 16-inch 416R stainless steel barrel, Flash Can Design 11 muzzle device, 15-inch freefloat M-LOK handguard, and Ranger adjustable A-frame stock with integrated QD sling mounts already included, pairing it with their own lower receiver
• Shooters building a 16-inch 9mm direct blowback AR-9 rifle platform who want the 9mm PCC BCG, charging handle, complete lower parts kit, and Ranger adjustable A-frame stock with QD sling mounts covered in one kit with a 6061 billet upper receiver and partial Picatinny top rail handguard
• AR-9 PCC rifle builders who want a complete blowback full build kit with a Glock and Colt pattern magazine compatible BCG, a 6061 billet upper receiver, and a Ranger adjustable A-frame stock with integrated QD sling mounts without sourcing components separately

Barrel and Muzzle Device

The 16-inch M4 profile barrel is chambered in 9mm and constructed from 416R stainless steel with a 1:10 twist rate and 1/2x36 thread pitch, which matches the included black oxide steel Flash Can Design 11 Rev 2 Pattern 2 muzzle device. A black crush washer is included. The direct blowback platform design addresses the 9mm cartridge in an AR-9 pistol caliber carbine build without a gas system.

Upper Receiver and Handguard

The 6061 billet aluminum upper receiver carries a black finish. The 15-inch freefloat M-LOK handguard is black with a partial Picatinny top rail and M-LOK attachment points along the body for accessory mounting. These two components define the exterior structure of the upper assembly on this AR-9 platform.

Bolt Carrier Group and Charging Handle

The complete 9mm PCC nitride bolt carrier group is 8620 alloy steel with a nitride finish and features an external extractor compatible with both Glock and Colt pattern 9mm 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 with a fire control group and includes an A2 grip in black. The buffer system includes a heavy-duty 6-position black aluminum Mil-Spec carbine buffer tube, a 9mm carbine buffer, a USA-made standard carbine recoil spring, a Mil-Spec receiver end plate, and an AR-15 carbine castle nut. The AR-15 Ranger adjustable A-frame stock in black features integrated QD sling mounts and pairs with the included Mil-Spec carbine buffer tube, covering the rear stock interface for this AR-9 rifle lower build kit.

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