Davidson Defense Nine Realms SBR Ready 5-inch 1:10 9MM AR-9 M-Lok Handguard Pistol Full Build Kit

Nine Realms SBR Ready 5-Inch 1:10 9mm AR-9 M-LOK Handguard Pistol Full Build Kit

The Nine Realms SBR Ready Full Build Kit is built around a 5-inch 9mm BC-9 barrel with a direct blowback operating system, a 6061 aluminum billet pistol caliber AR-15 upper receiver, a 4-inch free-float M-LOK handguard, and a complete 9mm bolt carrier group and charging handle. Lower receiver is not included, and this kit ships without a brace.

Key Features

• SBR Ready design
• 5-inch BC-9 barrel, slim profile, 1:10 twist, Parkerized finish
• Direct blowback operating system
• 6061 aluminum billet pistol caliber AR-15 upper receiver, black
• 4-inch free-float M-LOK handguard with full-length Picatinny top rail
• 9mm A2 birdcage flash hider on 1/2x36 threads with 1/2-inch black crush washer
• 8620 alloy steel 9mm Nitride BCG, compatible with Glock and Colt pattern magazines, and mil-spec quality M4 charging handle included
• Complete mil-spec AR-15 Lower Parts Kit and buffer-system components included
• Lower receiver is not included.

Barrel and Operating System

The 5-inch BC-9 barrel is built in a slim profile with a Parkerized finish and a 1:10 twist rate suited to 9mm. This build runs a direct blowback operating system rather than a gas-driven cycle, so a gas tube and gas block are not required. The muzzle carries a 9mm A2 birdcage flash hider on 1/2x36 threads, secured with the included 1/2-inch black crush washer.

Upper Receiver and Handguard

The upper receiver is a 6061 aluminum billet unit built specifically for the pistol caliber AR-15 platform, finished in black. It's paired with a 4-inch free-float M-LOK handguard featuring a full-length Picatinny top rail, built without anti-rotation tabs for a slim, uninterrupted profile along the short barrel.

Bolt Carrier Group and Charging Handle

The included bolt carrier group is machined from 8620 alloy steel with a Nitride finish and an external extractor, built for compatibility with Glock and Colt pattern magazines. A mil-spec quality AR-15 M4 charging handle is included alongside it.

Lower Parts Kit and Buffer System

A complete mil-spec AR-15 Lower Parts Kit is included, with its grip and the full fire control group. The buffer system pairs an AR-15 9mm carbine buffer with a USA-made standard AR-15 carbine recoil spring, along with the AR-15 carbine castle nut and mil-spec receiver end plate, cycling inside a heavy-duty mil-spec AR-15 six-position carbine buffer tube.

SBR Ready

This kit ships without a brace. It's built for customers who plan to finish their configuration on their own terms, so review the included component list above as supplied. This description does not represent a finished or ready-to-use firearm.

Follow all manufacturer instructions and safe handling practices.

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

Lower receiver is not included.

Ships without a brace.

Do not attach a stock unless the resulting configuration complies with all applicable federal, state, and local laws.