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

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

The Pappenheimer is a 9mm AR-9 Upper 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 stainless finish, 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. BCG and charging handle are not included.

Key Features

• 16-inch M4 profile 416R stainless steel barrel, stainless finish, 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
• BCG and charging handle not included

Perfect For

• AR-9 rifle builders sourcing a 9mm upper build kit 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, pairing it with their own AR-9 bolt carrier group and charging handle
• Shooters building a 16-inch 9mm direct blowback AR-9 rifle platform who prefer to select their own BCG while having the 416R stainless steel barrel, 6061 billet upper receiver, Flash Can Design 11 muzzle device, and freefloat M-LOK handguard covered in one kit
• AR-9 PCC rifle builders who want a 9mm upper build kit with a 6061 billet upper receiver and a 15-inch freefloat M-LOK handguard with a partial Picatinny top rail 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 stainless finish. The twist rate is 1:10 and the thread pitch is 1/2x36, 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.

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