Davidson Defense Cutlass 8.5-inch Pistol-Gas 1:9 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Davidson Defense Cutlass 8.5 Inch 300 BLK AR-15 Full Build Kit, Pistol Gas, Heavy Barrel, M-LOK Handguard, Complete BCG, SBR Ready

The Davidson Defense Cutlass delivers a serious foundation for 300 BLK builds that demand both suppressor compatibility and close quarters capability. This full build kit pairs an 8.5 inch heavy barrel with pistol gas metering for reliable cycling across subsonic and supersonic loads, while the 9.25 inch M-LOK handguard provides modern mounting real estate without adding unnecessary weight. The Panhead billet upper receiver features an enlarged 458 ejection port for improved reliability, and the complete nitride bolt carrier group ensures durability under sustained use. Ships without a brace, this SBR Ready configuration gives builders complete control over their final setup.

Key Features

• 8.5 inch heavy profile barrel in 4150 Chrome Moly Vanadium with 1 in 8 twist, optimized for 300 BLK subsonic and supersonic performance
• Pistol length gas system delivers consistent cycling with suppressed and unsuppressed configurations
• 9.25 inch M-LOK free float handguard with full length Picatinny top rail for optics and accessories
• Panhead billet upper receiver machined from 6061-T6 aluminum with enlarged 458 ejection port for enhanced ejection reliability
• Complete nitride bolt carrier group in 9310 alloy steel for extended service life
• 5/8x24 threaded muzzle with included flash can, ready for suppressor mounting or muzzle device swaps
• Micro low profile gas block in steel with phosphate finish for secure barrel attachment
• Mil-spec heavy duty 6 position buffer tube, standard carbine spring, and 3 oz buffer included
• SBR Ready, ships without a brace for customer selected final configuration
• Lower receiver not included

Perfect For

• Builders prioritizing 300 BLK versatility with subsonic suppressed capability and supersonic power in one platform
• Close quarters applications where compact length and quick handling matter most
• Shooters planning suppressor use who need proper gas metering and threaded barrel compatibility
• Experienced builders selecting their own lower receiver, brace, or stock based on intended use and compliance requirements

SBR Ready Configuration

This kit ships without a brace, giving you full control over your final setup. Whether you are building a pistol configuration with your preferred brace or planning an SBR build with a traditional stock, the Davidson Defense Cutlass provides a complete foundation minus only the lower receiver and stabilizing device. This approach ensures you get exactly what you need without compromising on component quality or configuration flexibility.

Panhead Billet Upper with Enhanced Ejection

The Panhead upper receiver is machined from 6061-T6 aluminum and features an enlarged 458 ejection port. This wider opening improves ejection reliability, particularly with heavier subsonic 300 BLK loads or when running suppressed. Paired with the anodized finish for corrosion resistance, this upper is built to handle the demands of frequent shooting and varied environmental conditions without compromising fit or function.

Heavy Barrel with Optimal Twist Rate

The 8.5 inch heavy profile barrel uses 4150 Chrome Moly Vanadium steel with a 1 in 8 twist rate, striking the balance needed for stabilizing both lightweight supersonic projectiles and heavy subsonic rounds. The Parkerized finish adds durability, and the 5/8x24 threading accommodates the majority of 300 BLK muzzle devices and suppressors on the market. Pistol length gas ensures reliable function across the widest range of ammunition types.

M-LOK Handguard with Full Top Rail

The 9.25 inch free float handguard extends just past the muzzle device, providing ample mounting space for lights, lasers, grips, and other accessories without adding bulk. M-LOK slots run along the sides and bottom for modular attachment, while the full length Picatinny top rail maintains zero for optics and backup irons. Aluminum construction keeps weight manageable without sacrificing strength.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Lower receiver not included. Ships without a brace. Do not install a stock unless compliant. Verify compatibility of all components before installation. Inspect headspace and function before live fire.