Details
Davidson Defense Silent Guardian 7.5" .300 BLK Full Build Kit with SBA5 Brace | 4150 CMV Nitride | Pistol-Gas | 7" M-Lok Freefloat
The Davidson Defense Silent Guardian with SBA5 Brace 7.5" .300 BLK AR-15 full build kit offers a compact and efficient shooting experience optimized for versatile .300 Blackout performance. Chambered in .300 Blackout, this kit features a 7.5-inch barrel made from 4150 Chrome Moly Vanadium steel with 1:8 twist rate, suitable for various ammunition types from supersonic to subsonic projectiles. The pistol-length gas system ensures reliable function in the lightweight configuration with consistent cycling. The 7-inch freefloat M-Lok handguard is made of 6061-T6 aluminum, providing versatile mounting options for accessories. The upper receiver is forged from 7075-T6 aluminum with anodized finish, featuring M4 feed ramps for enhanced feeding reliability. The kit includes a micro low-profile gas block, AR-15 complete bolt carrier group, Mil-Spec charging handle, SB Tactical SBA5 pistol stabilizing brace offering stability and control, and all necessary lower parts. Compatible with standard .300 Blackout ammunition and designed for skilled gunsmiths, this build kit is ideal for those seeking a reliable and compact AR-15 platform. This kit includes everything except the lower receiver.
Key Features
- 7.5" Barrel: 4150 Chrome Moly Vanadium steel with 1:8 twist rate suitable for various 300 BLK ammunition types
- Pistol-Length Gas System: Reliable function with micro low-profile gas block in lightweight configuration
- AR-15 Complete Bolt Carrier Group: Included for dependable cycling and consistent extraction
- Mil-Spec Charging Handle: Standard Mil-Spec design for reliable operation and broad compatibility
- 7075-T6 Aluminum Upper Receiver: Forged construction with anodized finish and M4 feed ramps
- 7" M-Lok Freefloat Handguard: 6061-T6 aluminum for versatile mounting options
- SB Tactical SBA5 Pistol Stabilizing Brace: Stability and control for compact pistol platform
- Complete Lower Parts Kit: Includes all necessary components for lower receiver assembly
- Full Build Kit: Includes everything to complete the build except the lower receiver
Perfect For
- Skilled Gunsmiths seeking reliable and compact AR-15 platform with efficient shooting experience
- Suppressor Users where compact configuration is compatible with standard .300 Blackout ammunition
- Home Defense and Tactical Applications where stability, control, and lightweight configuration are critical
- Shooters wanting versatile mounting options with proven SBA5 brace technology
Barrel Construction for Various Ammunition Types
The 7.5-inch barrel is made from 4150 Chrome Moly Vanadium steel, providing strength and durability for reliable performance in the compact .300 Blackout platform. The 1:8 twist rate is suitable for various ammunition types, stabilizing the diverse range of .300 BLK projectile weights from 110-grain supersonic ammunition for maximum velocity to 220-grain subsonic projectiles ideal for suppressed shooting. This twist rate ensures proper stabilization across the wide ammunition spectrum that makes .300 Blackout particularly versatile and efficient. The compact 7.5-inch length is particularly well-suited for .300 Blackout's design, delivering superior ballistic performance in short barrel configurations while maintaining the lightweight configuration critical for compact maneuverability.
Pistol-Length Gas System and Upper Receiver
The pistol-length gas system ensures reliable function in the lightweight configuration, delivering consistent extraction and ejection with micro low-profile gas block for streamlined integration. The pistol-length gas system is the shortest standard gas system length, positioned closer to the chamber to ensure adequate gas pressure for reliable operation in very short barrel applications. The micro low-profile design provides a streamlined profile that fits cleanly under freefloat handguards. This gas system length is particularly effective with .300 Blackout, which generates appropriate gas pressure for dependable cycling compatible with standard .300 Blackout ammunition in both supersonic and subsonic loadings. The upper receiver is forged from 7075-T6 aluminum with anodized finish, offering exceptional strength-to-weight ratio for the lightweight configuration. The M4 feed ramps enhance feeding reliability across diverse .300 BLK ammunition types.
Bolt Carrier Group and Charging Handle
The included AR-15 complete bolt carrier group ensures dependable cycling and consistent extraction performance across varied .300 Blackout ammunition types and shooting conditions. The BCG is designed to work seamlessly with the pistol-length gas system, providing reliable extraction and ejection in the compact 7.5-inch configuration. Paired with a Mil-Spec charging handle, the complete upper ensures smooth, dependable operation and broad compatibility with aftermarket upgrades and accessories, supporting the reliable function designed for skilled gunsmiths.
M-Lok Freefloat Handguard and SBA5 Brace System
The 7-inch freefloat M-Lok handguard is made of 6061-T6 aluminum, providing versatile mounting options for accessories while maintaining the lightweight configuration. The freefloat design isolates the barrel from external contact, supporting enhanced accuracy potential by eliminating pressure points that can affect barrel harmonics. The M-Lok attachment system provides versatile mounting points for lights, laser devices, vertical grips, and other accessories at multiple positions, allowing shooters to configure the compact platform for diverse shooting applications. The 7-inch length provides substantial coverage while maintaining the compact profile. The SB Tactical SBA5 pistol stabilizing brace offers stability and control for the compact pistol platform. The SBA5 is constructed from durable polymer, combining lightweight construction with impact resistance, representing proven SB Tactical stabilizing brace technology. The brace provides enhanced stability and shooter comfort, supporting improved control during shooting in the efficient, lightweight configuration.
Complete Build Package
The kit includes a complete lower parts kit with all necessary components for lower receiver assembly. This full build kit is ideal for those seeking a reliable and compact AR-15 platform, delivering a comprehensive solution designed for skilled gunsmiths. The Silent Guardian offers a compact and efficient shooting experience, compatible with standard .300 Blackout ammunition, combining reliable function, versatile mounting options, stability and control, all in a lightweight configuration optimized for the efficient .300 BLK cartridge.
Follow safe handling practices and manufacturer instructions for assembly and use. Ensure compliance with all applicable federal, state, and local laws regarding pistol configurations and stabilizing braces. This kit is chambered in .300 BLK. This kit includes all necessary components to complete the build—lower receiver sold separately.
