Davidson Defense Grimfang 4.5" 300 BLK AR-15 Pistol Build Kit with SBA3 Brace

Grimfang w/SBA3 Brace 300 BLK AR-15 Tubular Pistol Full Build Kit with Witt Machine Suppressor

This is a complete 300 Blackout AR-15 pistol build kit designed for shooters who want a compact, capable platform ready to suppress. It includes everything except the lower receiver: a 4.5-inch Bear Creek Arsenal barrel, free-float handguard, SBA3 stabilizing brace, bolt carrier group, charging handle, lower parts kit, buffer system, and a Witt Machine suppressor pre-threaded and ready to attach.

Key Features

• 4.5-inch 1:7 twist 300 BLK barrel engineered for subsonic ammunition
• Micro-length gas system with adjustable skeletonized gas block for reliable cycling
• 7-inch free-float handguard for precision and modular accessory mounting
• SBA3 adjustable pistol stabilizing brace for improved control and comfort
• Complete bolt carrier group compatible with 5.56 NATO, .223 Remington, .300 Blackout, and .350 Legend
• Mil-spec lower parts kit with standard fire control group and pistol grip
• Heavy-duty carbine buffer tube with 3 oz. standard buffer and recoil spring
• Witt Machine The Dirty .30 suppressor included, 4 inches long, 416 stainless steel with graphite black Cerakote finish, threaded 5/8x24

Perfect For

• Shooters building a suppressed 300 BLK pistol platform
• Hunters seeking a compact, quiet rifle for medium-range work
• Recreational shooters wanting a complete kit without sourcing individual parts
• Builders who prioritize precision and reliability over entry-level pricing

Micro-Length Gas System Precision

The micro-length gas system is optimized specifically for short-barrel 300 Blackout rifles. This shorter gas tube cycles the bolt carrier group with less felt recoil and improved reliability with subsonic ammunition. The adjustable skeletonized gas block allows fine-tuning for your specific load, making this kit adaptable to both standard and subsonic rounds.

Free-Float Handguard and Accuracy

The 7-inch smooth free-float handguard eliminates contact between the barrel and the rifle body, which improves accuracy and consistency. Free-float design also provides clean Picatinny rail real estate for mounting optics, lights, or other tactical accessories without interference.

Included Suppressor Ready to Use

The Witt Machine The Dirty .30 suppressor ships pre-installed on the barrel. This suppressor is rated for .30 caliber cartridges and reduces sound signature significantly, making it ideal for hearing protection during extended shooting sessions. The 4-inch length balances sound reduction with overall weapon length.

SBA3 Stabilizing Brace Configuration

The SBA3 brace attaches to the mil-spec carbine buffer tube and provides adjustable length-of-pull, making it comfortable for shooters of different sizes. The brace improves control and stability during firing compared to a bare tube, while remaining compliant with current federal law.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included. Verify suppressor compatibility and secure mounting before operation. Ensure secure mounting before operation. Use only in accordance with applicable laws.