Davidson Defense Big Stick 5.5-inch 1:16 10MM AR-15 Freefloat M-Lok Handguard Pistol Upper Build Kit

Big Stick 5.5-inch 1:16 10mm AR-15 Freefloat M-LOK Pistol Upper Build Kit

The Big Stick is a 10mm Auto AR-15 Upper Build Kit built around a compact 5.5-inch direct blowback platform. The kit centers on a 5.5-inch steel barrel with a black nitride finish, 1:16 twist rate, and 5/8x24 thread pitch, paired with a Pershing steel flash can and a black 5/8-inch crush washer. The billet pistol caliber AR-15 upper receiver in 6061 aluminum is paired with a 4-inch slim-line freefloat M-LOK handguard in black with a full-length Picatinny top rail. BCG and charging handle are not included.

Key Features

• 5.5-inch steel barrel, black nitride finish, 1:16 twist, 5/8x24 thread pitch, 10mm Auto
• Direct blowback platform
• Pershing steel flash can, 5/8x24, black 5/8-inch crush washer included
• Billet pistol caliber AR-15 upper receiver, 6061 aluminum
• 4-inch slim-line freefloat M-LOK handguard, black, full-length Picatinny top rail
• BCG and charging handle not included

Perfect For

• AR-15 PCC builders sourcing a compact 10mm Auto upper build kit with a billet pistol caliber upper receiver, black nitride barrel, and Pershing steel flash can, pairing it with their own bolt carrier group and charging handle
• Shooters building a compact 5.5-inch 10mm direct blowback pistol platform who prefer to select their own BCG while having the black nitride barrel, billet upper receiver, and slim-line freefloat M-LOK handguard with a full-length Picatinny top rail covered in one kit
• AR-15 PCC pistol builders who want a 10mm Auto upper build kit with a billet pistol caliber upper and Pershing steel flash can at a 5/8x24 thread pitch without sourcing components separately

Barrel and Muzzle Device

The 5.5-inch barrel is chambered in 10mm Auto and constructed from steel with a black nitride finish. The twist rate is 1:16 and the thread pitch is 5/8x24, which matches the included Pershing steel flash can. A black 5/8-inch crush washer is included. The direct blowback platform design addresses the 10mm Auto cartridge in a pistol caliber AR-15 pattern build.

Billet Upper Receiver and Handguard

The billet pistol caliber AR-15 upper receiver is 6061 aluminum and is designed around the 10mm direct blowback platform. The 4-inch slim-line freefloat M-LOK handguard is black with a full-length 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-15 pistol 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 10mm lower receiver before use.