Details
Davidson Defense Aftermath 10.5" 5.56 NATO Full Build Kit with Magpul BTR Brace | 4150 CMV Nitride | Carbine-Gas | FSB | Billet Slick Side | Quad-Rail
The Davidson Defense Aftermath with Magpul BTR Brace 10.5" full build kit is engineered for reliability in 5.56 NATO platforms with streamlined slick side aesthetics. Built around a 10.5-inch barrel made from 4150 Chrome Moly Vanadium steel with nitride finish for durability and 1:8 twist rate ideal for various projectiles from 55-grain to 77-grain bullets, this kit delivers consistent performance. The carbine-length gas system with A2 front sight base ensures smooth operation and provides a standard military-spec iron sight. The kit includes a robust carbine-length 2-piece quad-rail handguard crafted from aluminum, providing ample space for mounting accessories at multiple positions. The upper receiver is constructed from 6061-T6 billet aluminum with slick side design and anodized finish, guaranteeing strength and corrosion resistance. The complete bolt carrier group is made of 9310 alloy steel with nitride finish for enhanced performance and longevity. The kit includes a Mil-Spec charging handle and all necessary lower parts. Complemented by a Magpul BTR pistol brace in black, heavy-duty 6-position buffer tube, and GI birdcage flash hider, this comprehensive build kit is designed for gunsmiths seeking a versatile, high-quality AR-15 setup. This kit includes everything except the lower receiver.
Key Features
- 10.5" Barrel: 4150 Chrome Moly Vanadium steel with nitride finish and 1:8 twist rate for durability and versatile projectile compatibility
- Carbine-Length Gas System: Smooth operation with A2 front sight base (FSB) gas block for classic sight configuration
- Complete Bolt Carrier Group: Made of 9310 alloy steel with nitride finish for enhanced performance and longevity
- Mil-Spec Charging Handle: Standard Mil-Spec design for reliable operation and broad compatibility
- 6061-T6 Billet Aluminum Upper Receiver: Slick side design with anodized finish for strength and corrosion resistance
- Carbine-Length 2-Piece Quad-Rail Handguard: Robust aluminum construction with ample space for mounting accessories
- Magpul BTR Pistol Brace: Black finish for versatile support and stability
- Heavy-Duty 6-Position Buffer Tube: Robust construction for reliable operation and brace compatibility
- GI Birdcage Flash Hider: Effective flash reduction for improved visibility
- A2 Front Sight Base: Standard military-spec FSB for proven sight configuration
- 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
- Gunsmiths and Custom Builders seeking a versatile, high-quality compact pistol build kit with streamlined slick side aesthetics
- Home Defense and CQB Applications where maneuverability, reliability, and ample accessory space are critical
- Builders committed to high-quality setups with modern design elements and proven Magpul components
- Shooters wanting a comprehensive build kit engineered for reliability with robust construction
Barrel Construction and Nitride Finish
The 10.5-inch barrel is made from 4150 Chrome Moly Vanadium steel, a proven material choice for strength and durability in compact barrel configurations. The nitride finish enhances surface hardness and provides superior corrosion resistance, ensuring durability and consistent performance across extended shooting sessions and varied environmental conditions. The 1:8 twist rate is ideal for various projectiles, stabilizing ammunition from lightweight 55-grain bullets for high-velocity applications to heavier 77-grain match projectiles. This versatile twist rate supports diverse shooting applications, delivering dependable performance and accuracy in the compact 10.5-inch configuration.
Carbine Gas System and Front Sight Base Design
The carbine-length gas system is optimized for shorter barrel lengths like 10.5 inches, ensuring smooth operation with consistent extraction and ejection in compact configurations. The A2 front sight base (FSB) gas block serves dual purposes—functioning as both the gas block and providing a standard military-spec iron sight. This classic FSB configuration has been proven over decades of military use, offering robust construction, reliable performance, and a dependable backup sight system that requires no batteries or electronics. The A2 FSB maintains the traditional AR-15 aesthetic while providing proven functionality valued by shooters who prefer classic AR-15 designs with time-tested reliability.
Bolt Carrier Group and Charging Handle
The included complete bolt carrier group is made of 9310 alloy steel, a material selected for its exceptional strength and fatigue resistance under the high-pressure cycling demands of the AR-15 platform. The nitride finish provides enhanced performance and longevity, reducing friction for smoother operation while supporting reliable long-term performance across thousands of rounds. This treatment creates a hard, durable surface that improves wear characteristics and ensures consistent cycling and extraction performance. Paired with a Mil-Spec charging handle, the complete upper ensures smooth, dependable operation and broad compatibility with aftermarket upgrades and accessories.
Billet Slick Side Upper Receiver
The 6061-T6 billet aluminum upper receiver offers a unique combination of strength and streamlined aesthetics. The slick side design eliminates the forward assist and ejection port cover, creating a clean, minimalist appearance that reduces weight and complexity while maintaining structural integrity. The anodized finish guarantees strength and corrosion resistance for demanding shooting applications. Billet construction allows for tighter tolerances and enhanced machining detail compared to forged receivers, supporting precise fitment and consistent performance. The slick side configuration is particularly appealing to shooters who prioritize weight savings, simplified operation, and modern aesthetics in a versatile, high-quality setup.
Quad-Rail Handguard and Magpul BTR Brace System
The carbine-length 2-piece quad-rail handguard is crafted from robust aluminum, providing four-sided Picatinny rail coverage at 12, 3, 6, and 9 o'clock positions with ample space for mounting accessories. The 2-piece design allows for straightforward installation around the front sight base while enabling extensive accessory mounting capabilities. This quad-rail design allows for mounting of lights, laser devices, vertical grips, and other Picatinny-compatible accessories at multiple positions, allowing shooters to configure the platform to match their specific needs. The Magpul BTR pistol brace in black is constructed from durable polymer, providing versatile support and stability for compact pistol platforms. Compatible with the included heavy-duty 6-position buffer tube, the BTR brace represents Magpul's proven approach to stabilizing brace design, supporting enhanced shooting stability while maintaining pistol configuration and ensuring robust construction for reliable operation.
Muzzle Device and Complete Build Package
The included GI birdcage flash hider effectively reduces muzzle flash, improving visibility and target tracking during rapid-fire strings and low-light shooting scenarios. Flash reduction is particularly important on shorter barrels like 10.5 inches, where increased muzzle flash is more pronounced. The kit includes a complete lower parts kit with all necessary components for lower receiver assembly, providing gunsmiths with everything needed to complete the pistol build except the lower receiver itself. This comprehensive build kit is designed for gunsmiths seeking a versatile, high-quality AR-15 setup with streamlined slick side upper design, enhanced performance components, proven Magpul BTR brace, and robust construction engineered for reliability throughout.
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 5.56 NATO. This kit includes all necessary components to complete the build—lower receiver sold separately.
