Details
Davidson Defense Latency 10.5" .300 BLK AR-15 Pistol Full Build Kit - SBR Ready | Pistol-Gas | Adjustable Gas Block | 1:8 Twist | FSB | Suppressor-Ready | BCG Included
A versatile .300 Blackout full build kit in SBR Ready configuration with adjustable gas system for suppressor-ready performance. Built around a 10.5-inch 4150 CrMoV nitride barrel with 1:8 twist rate and A2 F-marked front sight base, this configuration stabilizes bullet weights from 110 to 220 grains across subsonic and supersonic loads. The pistol-length gas system features an adjustable gas block mounted beneath the handguard and stainless steel gas tube, allowing shooters to fine-tune gas flow for optimal cycling with both suppressed and unsuppressed fire. The carbine-length quad-rail handguard machined from 6061-T6 aluminum provides extensive four-sided Picatinny rail coverage for lights, optics, and accessories. This full build kit includes a complete 9310 alloy steel bolt carrier group, mil-spec charging handle, heavy-duty mil-spec buffer tube assembly, and standard carbine recoil buffer. This SBR Ready configuration ships without a brace, allowing builders to choose their preferred final setup via configuration.
Key Features
- SBR Ready Configuration: Ships without a brace for builders who prefer to configure their own setup
- 10.5" 4150 CrMoV Nitride Barrel: 1:8 twist rate stabilizes .300 BLK bullet weights from 110 to 220 grains
- Adjustable Gas Block: Mounted under handguard for fine-tuned gas flow optimization with suppressed and unsuppressed fire
- Complete 9310 Alloy Steel Bolt Carrier Group: Wear resistance and consistent cycling across varied ammunition types
- A2 F-Marked Front Sight Base: Co-witness capability and backup iron sight functionality
- Suppressor-Ready Design: Adjustable gas system for seamless suppressor integration
- Pistol-Length Gas System: Stainless steel gas tube engineered for short-barreled .300 Blackout configurations
- Carbine-Length Quad-Rail Handguard: 6061-T6 aluminum construction with continuous four-sided Picatinny rail coverage
- 7075-T6 Aluminum Upper Receiver with M4 Feed Ramps: Enhanced feeding reliability and durability
- Heavy-Duty Mil-Spec Buffer Tube Assembly: Standard carbine recoil buffer for reliable recoil management
- Mil-Spec Charging Handle: Standard AR-15 reciprocating operation and compatibility
Perfect For
- Builders who want an SBR Ready configuration without an included brace and suppressor-ready adjustable gas system
- Suppressor users requiring adjustable gas systems for optimal cycling across sound signatures
- .300 Blackout AR-15 pistol or SBR builds optimized for both subsonic and supersonic ammunition versatility
- Shooters who prefer to select their own brace or stock configuration with tunable gas flow
- Home defense and vehicle-based applications demanding compact, adaptable platforms
SBR Ready Configuration with Adjustable Gas System
This SBR Ready configuration ships without a brace, providing builders with maximum flexibility to configure their platform according to their specific needs and preferences. The kit includes all essential upper and buffer components—complete 9310 alloy steel bolt carrier group, mil-spec charging handle, heavy-duty mil-spec buffer tube assembly with standard carbine recoil buffer, A2 F-marked front sight base, and adjustable gas block—allowing builders to pair the upper assembly with their choice of lower receiver and preferred brace or stock configuration. The adjustable gas block allows shooters to precisely tune gas flow to match their specific shooting conditions, particularly valuable for suppressor use where reduced gas flow minimizes blowback and excessive bolt velocity. This approach gives builders complete control over their final setup while delivering a comprehensive upper package ready for integration. See configuration for available options to complete your build.
Optimized .300 BLK Barrel with Front Sight Base
The 10.5-inch barrel length maximizes powder burn efficiency for .300 Blackout chambering while maintaining a compact, maneuverable profile. The 1:8 twist rate stabilizes bullet weights ranging from 110 to 220 grains, accommodating both high-velocity supersonic loads and quiet subsonic expansion rounds—a critical feature for shooters who leverage .300 BLK's dual-nature capability. The 4150 CrMoV steel construction with nitride finish delivers superior corrosion resistance, enhanced surface hardness, and bore protection, extending barrel life even under the elevated heat and carbon fouling associated with suppressed fire. The included A2 F-marked front sight base provides reliable backup aiming capability and co-witnesses seamlessly with modern red dot optics.
Pistol-Length Gas System and M4 Feed Ramps
The pistol-length gas system is purpose-built for short-barreled .300 Blackout configurations, featuring an adjustable gas block positioned beneath the handguard—separate from the front sight base—and stainless steel gas tube. This setup provides optimal dwell time and pressure regulation for this chambering. Combined with the adjustable gas block, this system ensures consistent cycling across the full spectrum of .300 BLK ammunition—from light supersonic loads to heavy subsonic projectiles—while allowing shooters to manage felt recoil, ejection pattern, and gas blowback according to their specific configuration. This adjustability is particularly valuable when transitioning between different suppressors, ammunition brands, or environmental conditions that affect gas system performance. The upper receiver's M4 feed ramps enhance feeding reliability by guiding cartridges smoothly from the magazine into the chamber, reducing the potential for feeding malfunctions and improving overall function with various ammunition types and magazine configurations.
Quad-Rail Modularity for Custom Configuration
The carbine-length quad-rail handguard delivers continuous Picatinny rail coverage on all four sides, accommodating weapon lights, laser aiming devices, vertical grips, and optic risers. Machined from 6061-T6 aluminum, the handguard maintains structural rigidity under recoil while keeping overall weight manageable—an important consideration for suppressor-ready builds where muzzle device and suppressor weight must be accounted for. The four-sided rail configuration provides maximum flexibility for custom accessory placement, allowing builders to configure the platform for specific mission requirements or personal preferences—an ideal complement to the SBR Ready configuration's inherent builder flexibility and the adjustable gas system's tuning capability.
Follow safe handling practices and manufacturer instructions at all times. Ensure compliance with all applicable federal, state, and local laws. SBR Ready configuration ships without a brace. Know and follow all applicable laws, and don't install a stock unless compliant. Verify .300 BLK ammunition compatibility and avoid mixing calibers. Confirm proper headspacing and component fitment before firing. Adjust gas block incrementally and test function with chosen ammunition and suppressor configuration.
