Davidson Defense Cutlass 10.5-inch Pistol-Gas 1:8 .300 BLK AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Cutlass 10.5 Inch Pistol Gas 1 to 8 Twist 300 Blackout Freefloat M Lok Full Build Kit, SBR Ready

The Cutlass 10.5 inch 300 Blackout Full Build Kit gives you everything except the lower receiver for a compact hard hitting AR platform. The 10.5 inch barrel is made from 4150 CrMoV steel with a phosphate finish and heavy barrel profile, paired with a pistol length gas system for reliable cycling with both subsonic and supersonic loads. The 1 to 8 twist rate stabilizes heavier projectiles without overspin, making it versatile across the 300 Blackout spectrum. The Panhead billet upper receiver is machined from 6061 T6 aluminum and matches perfectly with the 9.25 inch M Lok freefloat handguard, giving you plenty of real estate for lights grips and other accessories. The kit includes a micro low profile gas block, mil spec charging handle, complete nitride finished bolt carrier group made from 9310 alloy steel, heavy duty 6 position buffer tube, standard carbine buffer, and a GI birdcage flash hider threaded 5/8x24. No brace is included, letting you configure your build exactly how you want it.

Key Features

• 10.5 inch 300 Blackout barrel with 4150 CrMoV steel construction and phosphate finish for durability
• Pistol length gas system optimized for shorter barrel performance with 300 Blackout loads
• 1 to 8 twist rate stabilizes both subsonic and supersonic ammunition effectively
• Panhead billet upper receiver machined from 6061 T6 aluminum with anodized finish
• 9.25 inch M Lok freefloat handguard provides modular attachment points and full length coverage
• Complete nitride bolt carrier group made from 9310 alloy steel for strength and reliability
• Ships without a brace, intended for customers selecting their own final configuration
• Includes buffer tube, carbine buffer, charging handle, and 5/8x24 threaded muzzle device

Perfect For

• Builders wanting a compact 300 Blackout platform for suppressed shooting or close quarters use
• Shooters who prefer heavier subsonic loads and need proper stabilization
• Anyone configuring their own SBR setup with preferred components
• Experienced builders comfortable selecting their own brace or stock based on intended use

Heavy Profile Barrel Built for Heat and Accuracy

The HBAR profile barrel adds mass where it counts, improving heat dissipation during extended strings and reducing barrel whip for better consistency. The phosphate finish protects against corrosion and wear while the 4150 CrMoV steel core handles the pressure spikes that come with 300 Blackout loads. At 10.5 inches, this barrel length delivers excellent velocity with supersonic ammo while still allowing subsonic rounds to cycle reliably through the pistol gas system.

Billet Upper Receiver and M Lok Handguard

The Panhead billet upper is machined from a solid block of 6061 T6 aluminum, offering tight tolerances and a clean aesthetic compared to forged alternatives. The 9.25 inch M Lok handguard runs almost the full length of the barrel, providing plenty of attachment space for lights pressure switches vertical grips and other accessories without adding unnecessary bulk. The freefloat design eliminates contact with the barrel, ensuring your zero stays consistent even when you load up the rail.

Complete Bolt Carrier Group and Buffer System

The bolt carrier group is made from 9310 alloy steel with a nitride finish, giving you a hard wear resistant surface that reduces friction and extends service life. The mil spec heavy duty 6 position buffer tube is built to handle the recoil impulse of 300 Blackout, and the standard carbine buffer provides reliable cycling with most factory ammunition. The mil spec charging handle is a straightforward design that gets the job done without complications.

SBR Ready Configuration

This kit ships without a brace, giving you the flexibility to configure your build based on your intended use and compliance requirements. Whether you plan to register it as an SBR or install a pistol brace, the foundation is here and ready for your chosen setup. Do not install a stock unless compliant with applicable regulations.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Lower receiver not included. Ships without a brace, intended for customers selecting their own final setup. Do not install a stock unless compliant. Verify compatibility before assembly.