Details
Davidson Defense Safehouse 10.5" .300 Blackout AR-15 Pistol Full Build Kit | Gauntlet Arms Brace | 1:8 Twist | Quad Rail Handguard | Adjustable Gas Block
This Davidson Defense Safehouse full build kit is tailored for precision and performance in .300 Blackout applications. Built around a robust 10.5-inch barrel crafted from 4150 Chrome Moly Vanadium steel with nitride coating and 1:8 twist rate, this kit ensures durability and reliable cycling across subsonic and supersonic loads. The premium adjustable gas block located under the handguard allows for fine-tuning with various ammunition types and suppressor configurations. The carbine-length quad-rail handguard made of aluminum provides versatile accessory mounting on all four sides, while the M4-style upper receiver crafted from 7075-T6 aluminum is anodized to resist wear. Equipped with a reliable pistol-length gas system, AR-15 5.56/.223/.300/.350 complete bolt carrier group made from 9310 alloy steel with nitride finish, and polymer stabilizing brace from Gauntlet Arms for added stability, this suppressor-ready configuration offers adaptable use for gunsmiths who value performance and versatility.
Key Features
- 10.5" .300 Blackout Barrel – 4150 CrMoV steel with nitride coating and 1:8 twist rate for durability
- Premium Adjustable Gas Block – Fine-tuning capability for ammunition and suppressor versatility (located under handguard)
- Front Sight Post – Integrated sight (not used as gas block; gas block is located under handguard)
- Pistol-Length Gas System – Reliable cycling optimized for 10.5-inch barrel
- Carbine-Length Quad-Rail Handguard – Aluminum construction for versatile accessory mounting on all four sides
- M4-Style Upper Receiver – 7075-T6 aluminum anodized to resist wear
- Complete 9310 Alloy Steel Bolt Carrier Group – Nitride finish for reliable multi-caliber performance
- Gauntlet Arms Polymer Stabilizing Brace – Added stability for pistol configurations
- Suppressor-Ready Configuration – Adaptable use for various shooting applications
Perfect For
- Gunsmiths who value precision and performance in .300 Blackout builds
- Shooters requiring adjustable gas for fine-tuning with suppressors
- Tactical applications needing versatile quad-rail accessory mounting
- Builders seeking a complete kit with multi-caliber bolt carrier group compatibility
4150 CrMoV Barrel with Nitride Coating
The robust 10.5-inch barrel is made from 4150 Chrome Moly Vanadium steel with a nitride coating for exceptional durability and corrosion resistance. The 1:8 twist rate ensures reliable stabilization for .300 Blackout ammunition across both subsonic loads (typically 190-220 grains) and supersonic loads (110-125 grains). This versatility makes the barrel equally capable for suppressed subsonic shooting with minimal sound signature and high-velocity supersonic applications for maximum energy delivery. The nitride finish extends barrel life even under demanding use, providing the precision and performance gunsmiths expect from quality components.
Premium Adjustable Gas Block
The premium adjustable gas block is located under the handguard and allows for fine-tuning with various ammunition types and suppressor configurations. This adjustability is critical for .300 Blackout platforms that may run both subsonic and supersonic loads, with or without a suppressor. By adjusting gas flow, you can ensure proper cycling with heavy subsonic ammunition when suppressed, then adjust for reliable operation with supersonic loads or unsuppressed shooting. This suppressor-ready configuration provides adaptable use across diverse shooting scenarios, from tactical applications to recreational range sessions. Note: The front sight post is not used as a gas block; the adjustable gas block is located under the handguard.
Carbine-Length Quad-Rail Handguard
The carbine-length quad-rail handguard is made of aluminum and provides versatile accessory mounting on all four sides. Picatinny rails offer comprehensive mounting options for lights, lasers, foregrips, pressure switches, and other tactical gear exactly where you need them. This maximum mounting flexibility is particularly valuable for suppressor-host configurations, night vision setups, or any build requiring multiple accessories positioned around the compact pistol platform. The aluminum construction keeps overall weight manageable while providing a rigid mounting platform that maintains zero for precision equipment.
Multi-Caliber Bolt Carrier Group
The AR-15 5.56/.223/.300/.350 complete bolt carrier group is made from 9310 alloy steel with a nitride finish for exceptional hardness, corrosion resistance, and reliable multi-caliber performance. This BCG is engineered to work reliably with .300 Blackout while maintaining compatibility with other calibers including 5.56 NATO, .223 Remington, and .350 Legend. The nitride finish extends component life and ensures consistent cycling even under demanding use. The pistol-length gas system operates reliably with this BCG, providing the consistent performance gunsmiths demand for precision builds.
M4-Style Upper and Gauntlet Arms Brace
The M4-style upper receiver is crafted from 7075-T6 aluminum and anodized to resist wear, providing a durable foundation that maintains dimensional stability over time. The anodized finish protects against environmental exposure and handling wear for long-term reliability. The polymer stabilizing brace from Gauntlet Arms offers added stability for pistol configurations while maintaining a lightweight profile. The polymer construction provides durability and strength without adding unnecessary weight, enhancing shooter control and accuracy potential for this complete build kit designed for adaptable use across various shooting applications.
Always follow safe handling and manufacturer instructions.
Ensure compliance with all applicable federal, state, and local laws.
If using a suppressor, verify proper gas system adjustment for reliable cycling with your specific ammunition and suppressor combination.
Confirm fitment and compatibility with your lower receiver and brace usage regulations before assembly.
