Davidson Defense Stormborn 7.5" 5.56 NATO AR-15 Pistol Build Kit, M-Lok Handguard, 1:7, w/ SBA5 Brace

Stormborn 7.5" 5.56 NATO AR-15 Pistol Build Kit, M-Lok Handguard, 1:7, w/ SBA5 Brace

The Davidson Defense Stormborn is a complete AR-15 pistol build kit chambered in 5.56 NATO with a 7.5-inch barrel, 1:7 twist rate, and freefloat M-Lok handguard. This kit ships fully assembled upper to lower, ready to function out of the box. The SBA5 brace provides stable control, and the pistol-length gas system delivers reliable cycling in a compact package designed for shooters who want a maneuverable 5.56 platform without the NFA requirements of a short-barreled rifle.

Key Features

• 7.5-inch 4150 Chrome Moly Vanadium barrel with 1:7 twist rate for 5.56 NATO
• Freefloat M-Lok handguard with 7-inch length for versatile accessory mounting
• Micro low-profile gas block sized for pistol-length operation
• Billet upper receiver with .458 ejection port door and anodized finish
• SB Tactical SBA5 stabilizing brace in black nylon reinforced polymer
• Complete bolt carrier group in nitride finish, made in the USA
• A2 flash hider with 1/2x28 thread pitch for muzzle device compatibility
• Pistol-gas system optimized for short barrel reliability

Perfect For

• Shooters building a compact 5.56 pistol platform without NFA registration
• Home defense setups requiring maneuverability in tight spaces
• Recreational shooting and training in confined areas
• Shooters who want freefloat accuracy without full-size rifle length

Compact Caliber Platform with Proven Reliability

The 7.5-inch barrel in 5.56 NATO delivers velocity and accuracy suitable for pistol-distance engagements while remaining compact enough for vehicle storage or close-quarters use. The 1:7 twist rate stabilizes standard and heavier 5.56 rounds effectively. Pistol-length gas systems are known for reliability with shorter barrels because they optimize dwell time, the period between when the bullet passes the gas port and when the bolt carrier unlocks. This kit's micro gas block is sized specifically for pistol-length operation, ensuring consistent cycling.

Freefloat Handguard and Accessory Ecosystem

The 7-inch M-Lok handguard floats free from the barrel, meaning it doesn't make contact with the barrel itself. This design eliminates the accuracy variables that come from pressure points and allows the barrel to vibrate naturally without external interference. M-Lok slots run along the handguard, letting you attach lights, vertical grips, rail sections, or other tactical accessories without tools or proprietary mounting systems. The 7-inch length balances coverage over the gas system while keeping the overall platform short and maneuverable.

Billet Upper and Precision Ejection Port

The Panhead billet upper receiver is machined from 6061-T6 aluminum and anodized for durability. The .458 ejection port door is oversized, ensuring reliable case ejection even with suppressed fire or various ammunition types. Billet uppers are manufactured through precision machining rather than forging, allowing for tighter tolerances and cleaner internal geometry. The anodized finish resists corrosion and wear.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.