Davidson Defense Foxhole 10.5-inch Carbine-Gas 1:8 5.56 NATO AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, SBR Ready

Davidson Defense Foxhole 10.5" Carbine-Gas 1:8 5.56 NATO AR-15 Full Build Kit | Nitride Barrel, Trinity Force MX10 M-Lok Handguard & Complete BCG

The Davidson Defense Foxhole 10.5" Full Build Kit delivers everything needed for a complete upper assembly in a compact, versatile package. At its core is a 10.5-inch "Sandel" barrel crafted from 4150 Chrome Moly Vanadium with a durable nitride finish and 1:8 twist rate for reliable stabilization of 55gr–77gr 5.56 NATO projectiles. The carbine-length gas system ensures smooth, consistent cycling, while the included AR-15 1/2x28 TPI GI A2 flash hider provides effective muzzle control. The kit features a Trinity Force MX10 M-LOK handguard for lightweight accessory mounting and a 7075-T6 aluminum upper receiver with anodized finish for durability. A complete bolt carrier group made from 9310 alloy steel and a standard carbine recoil buffer system are included, delivering a ready-to-assemble upper with all essential components. Ideal for builders seeking a compact, modular platform, this kit offers quality materials and practical design in a pistol-length configuration.

Key Features

• 10.5" "Sandel" barrel made from 4150 Chrome Moly Vanadium with nitride finish for corrosion and wear resistance
• 1:8 twist rate stabilizes 55gr–77gr 5.56 NATO ammunition
• Carbine-length gas system for reliable cycling across various loads
• Trinity Force MX10 M-LOK handguard provides lightweight accessory mounting platform
• 7075-T6 aluminum upper receiver with anodized finish for enhanced durability
• Complete 9310 alloy steel bolt carrier group included
• Standard carbine recoil buffer system included
• 1/2x28 TPI GI A2 flash hider for effective muzzle control
• Complete upper build kit—all components included for assembly

Perfect For

• Custom AR-15 pistol builds requiring a compact, maneuverable platform
• Home defense and vehicle applications where compactness is critical
• Builders seeking a complete upper kit with all essential components included
• Gunsmiths and enthusiasts looking for quality materials and modular design
• Shooters upgrading to M-LOK handguard systems from traditional rail configurations

Nitride-Finished Barrel for Enhanced Durability

The 10.5-inch "Sandel" barrel features a nitride finish that provides superior corrosion resistance, wear resistance, and surface hardness compared to standard phosphate coatings. This heat-treated finish penetrates the steel surface rather than simply coating it, resulting in a barrel that resists fouling, cleans easier, and maintains accuracy over extended use. The 1:8 twist rate handles a broad range of bullet weights, from lightweight 55gr to heavier 77gr projectiles, giving you flexibility in ammunition selection for training, competition, or defensive applications.

Trinity Force MX10 M-LOK Handguard

The Trinity Force MX10 M-LOK handguard offers modern accessory mounting without the bulk of traditional quad-rail systems. The freefloat design eliminates barrel contact to preserve accuracy, while the M-LOK slots provide a secure, low-profile mounting interface for lights, grips, and sling attachments. Its lightweight construction reduces front-end weight, improving handling and reducing fatigue during extended shooting sessions.

Complete BCG and Buffer System Included

This kit includes a complete bolt carrier group manufactured from 9310 alloy steel—a material known for its strength, durability, and resistance to wear under high-stress cycling. The standard carbine recoil buffer system ensures proper timing and cycling, while the 7075-T6 aluminum upper receiver with anodized finish provides a robust foundation for all components. With the BCG, buffer system, and upper receiver included, you have everything needed to complete your upper assembly—just add your lower receiver and optics.

Ready for Custom Configuration

The Foxhole Full Build Kit arrives with all essential components for a functional upper assembly. The 1/2x28 TPI threads accept standard AR-15 muzzle devices, allowing you to swap the included GI A2 flash hider for a compensator, brake, or suppressor mount as your needs evolve. The M-LOK handguard provides flexibility for lights, lasers, grips, and other accessories, while the carbine-length gas system ensures reliable operation across a variety of shooting conditions.

Disclaimer: Follow all safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Verify compatibility with your lower receiver before purchase.