Davidson Defense Pappenheimer 16-inch 1:10 9mm AR-9 Freefloat M-Lok Handguard Rifle Complete Upper Build

Pappenheimer 16-inch 1:10 9mm AR-9 Freefloat M-LOK Handguard Rifle Complete Upper

The Pappenheimer is a 9mm AR-9 Complete Upper 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 component set.

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

Perfect For

• AR-9 rifle builders sourcing a complete 9mm blowback upper with a 6061 billet upper receiver, 16-inch 416R stainless steel barrel, Flash Can Design 11 Rev 2 Pattern 2 muzzle device, and 15-inch freefloat M-LOK handguard with partial Picatinny top rail ready to pair with their own lower receiver
• Shooters building a 16-inch 9mm direct blowback AR-9 rifle platform who want the 9mm PCC BCG and charging handle covered in one complete upper with a 6061 billet upper receiver and freefloat M-LOK handguard
• AR-9 PCC rifle builders who want a complete 9mm blowback upper with a Glock and Colt pattern magazine compatible BCG and a 6061 billet upper receiver 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.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify compatibility with your specific 9mm AR-9 lower receiver and magazine pattern before use.