Davidson Defense Aegis w/SBA3 Brace 14.5-inch Carbine-Gas 1:7 556 AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, DTT Plan B Bartizan Muzzle Brake

Aegis w/SBA3 Brace 14.5-inch Carbine-Gas 1:7 556 AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit, DTT Plan B Bartizan Muzzle Brake

This complete AR-15 pistol build kit includes everything needed except the lower receiver. The 14.5-inch 4150 CrMoV barrel with 1:7 twist rate delivers reliable performance across a wide range of 5.56 NATO ammunition. The M-Lok free float handguard eliminates barrel contact for improved accuracy, while the adjustable carbine-length gas block allows fine-tuning for your specific configuration.

Key Features

• 14.5-inch 4150 CrMoV barrel with 1:7 twist rate and phosphate finish
• Premium low profile adjustable gas block for tuning
• 12-inch M-Lok free float handguard in 6061-T6 aluminum
• SB Tactical SBA3 adjustable pistol stabilizing brace
• Complete bolt carrier group in 9310 alloy steel with nitride finish
• DTT Plan B Bartizan muzzle brake with modular mounting ecosystem
• Mil-spec charging handle and forward assist assembly
• Mil-spec heavy-duty buffer tube kit

Perfect For

• AR-15 builders seeking a complete pistol platform without the lower receiver
• Shooters wanting adjustable gas tuning for reliability
• Builders who prefer free float handguard accuracy
• Users planning modular suppressor mounting with Plan B ecosystem

Plan B Muzzle Device Ecosystem

The DTT Plan B Bartizan muzzle brake provides 1/2x28 thread compatibility and integrates with the. Plan B modular suppressor mounting ecosystem. This design allows you to swap between muzzle devices and suppressors within the same platform without re-indexing. The stainless steel construction with black nitride finish resists corrosion and maintains durability across extended use cycles.

Complete Build Kit Contents

This full build kit includes the upper assembly, bolt carrier group, charging handle, lower parts kit, buffer tube, buffer, recoil spring, end plate, castle nut, and SBA3 brace. The lower receiver is not included. All major components are sourced for reliability and mil-spec compatibility, ensuring consistent function and straightforward assembly.

Adjustable Gas System for Tuning

The premium low profile adjustable gas block allows you to fine-tune cycling performance based on your ammunition type and configuration. The carbine-length stainless steel gas tube integrates with the upper receiver for consistent gas delivery. This tuning capability helps optimize reliability when using different ammunition loads or when running suppressors.

Freefloat Handguard Accuracy

The 12-inch M-Lok free float handguard in 6061-T6 aluminum isolates the barrel from contact with the upper receiver, reducing accuracy variables. The free float design supports repeatable shooting performance and works seamlessly with the M-Lok mounting system for accessories. The handguard geometry provides control and stability during extended shooting sessions.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable laws. Lower receiver not included. Verify all components are properly seated before operation.