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

Shakedown 16-inch 9mm AR-9 Upper Build Kit

The Shakedown is built around a 16-inch 9mm barrel machined from 416R stainless steel with an M4 profile, paired with a 6061 pistol-caliber AR-15 billet upper receiver. It pairs a 12-inch ultra-lightweight minimalist M-LOK handguard with a KAK Industry 9mm Mini Compensator at the muzzle. It runs on a direct blowback operating system. BCG and charging handle are not included, leaving the buyer to supply those components separately.

Key Features

• 16-inch 9mm barrel, 1:10 twist, 416R stainless steel, M4 profile
• Direct blowback operating system
• 6061 pistol-caliber AR-15 billet upper receiver
• 12-inch ultra-lightweight minimalist M-LOK handguard, partial Picatinny top rail
• KAK Industry 9mm Mini Compensator
• BCG and charging handle are not included.

Barrel and Muzzle Device

The barrel runs 16 inches long, chambered in 9mm and machined from 416R stainless steel with an M4 profile. It carries a 1:10 twist rate and operates on a direct blowback system rather than a gas-driven cycle. At the muzzle sits a KAK Industry 9mm Mini Compensator, threaded to match the barrel's 1/2x36 pattern and secured with the included 1/2-inch black crush washer.

Upper Receiver and Handguard

The upper receiver is a 6061 billet unit built for the pistol-caliber AR-15 platform, compatible with PCC/blowback operation. Over the barrel sits a 12-inch ultra-lightweight minimalist handguard, using an M-LOK attachment system with a partial Picatinny top rail rather than a full-length rail. This handguard does not include anti-rotation tabs.

Follow all manufacturer instructions and safe handling practices.

Ensure compliance with all applicable federal, state, and local laws.

BCG and charging handle are not included.