Details
Davidson Defense Aftermath 10.5" 5.56 NATO Complete Upper Build | 4150 CMV Nitride | Carbine-Gas | FSB | Billet Slick Side | Quad-Rail
The Davidson Defense Aftermath 10.5" 5.56 NATO complete upper build is engineered for AR-15 pistol platforms, offering a robust solution with streamlined slick side aesthetics. Built around a 10.5-inch barrel constructed from 4150 Chrome Moly Vanadium steel with nitride finish for enhanced durability and corrosion resistance, this upper delivers reliable operation. The barrel features a carbine-length gas system with A2 front sight base and 1:8 twist rate, ensuring reliable operation and precision accuracy across diverse ammunition types. The upper receiver is crafted from 6061-T6 billet aluminum with slick side design for streamlined performance. The complete upper is equipped with a complete bolt carrier group made from 9310 alloy steel with nitride finish for enhanced hardness, Mil-Spec charging handle, and all essential components. The carbine-length 2-piece quad-rail handguard is made from aluminum with black finish, providing ample space for accessories and secure grip. Complementing the design is a GI birdcage flash hider with 1/2x28 muzzle thread pitch. The Aftermath is an ideal choice for any gunsmith seeking functionality and performance in a compact package with modern aesthetics.
Key Features
- 10.5" Barrel: 4150 Chrome Moly Vanadium steel with nitride finish and 1:8 twist rate for durability and precision accuracy
- Carbine-Length Gas System: Reliable operation with A2 front sight base (FSB) gas block for classic sight configuration
- Nitride Bolt Carrier Group: Made from 9310 alloy steel with nitride finish for enhanced hardness and corrosion resistance
- Mil-Spec Charging Handle: Standard Mil-Spec design for reliable operation and broad compatibility
- 6061-T6 Billet Aluminum Upper Receiver: Slick side design without forward assist or ejection port cover for streamlined aesthetics
- Carbine-Length 2-Piece Quad-Rail Handguard: Aluminum with black finish for ample accessory space and secure grip
- GI Birdcage Flash Hider: 1/2x28 muzzle thread pitch for effective flash reduction
- A2 Front Sight Base: Standard military-spec FSB for proven sight configuration
- Complete Upper Build: Assembled upper with BCG and charging handle—ready to pair with your preferred lower receiver
Perfect For
- Gunsmiths and Custom Builders seeking a complete compact upper with streamlined slick side aesthetics and quality components
- Home Defense and CQB Applications where maneuverability, functionality, and reliable cycling are critical
- Builders who prefer clean, minimalist upper receiver design with proven FSB configuration
- Shooters wanting a robust solution in a compact package with modern performance
Barrel Construction and Nitride Finish
The 10.5-inch barrel is constructed 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 enhanced durability and consistent performance across extended shooting sessions and varied environmental conditions. The 1:8 twist rate ensures reliable operation and precision accuracy, stabilizing a wide range of projectile weights 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 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 reliable 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 from 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 hardness and corrosion resistance, 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, delivering functionality and performance throughout.
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. 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 over traditional AR-15 features, emphasizing streamlined performance without unnecessary components.
2-Piece Quad-Rail Handguard System
The carbine-length 2-piece quad-rail handguard is made from aluminum with black finish, providing four-sided Picatinny rail coverage at 12, 3, 6, and 9 o'clock positions. The 2-piece design allows for straightforward installation around the front sight base while providing ample space for accessories and secure grip. 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 aluminum construction with black finish complements the streamlined upper receiver design, maintaining reduced overall weight while providing maximum mounting flexibility for functionality in a compact package.
GI Birdcage Flash Hider
The included GI birdcage flash hider with 1/2x28 muzzle thread pitch 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 standard 1/2x28 threading supports a wide variety of aftermarket muzzle devices, providing builders with extensive options for customization based on their specific shooting needs. This proven military-standard design delivers reliable flash suppression while maintaining a compact profile, making it an ideal choice for any gunsmith seeking functionality and performance.
Follow safe handling practices and manufacturer instructions for assembly and use. Ensure compliance with all applicable federal, state, and local laws. This upper is chambered in 5.56 NATO. Complete upper pairs with lower receiver.
