Davidson Defense Strata w/Gauntlet Arms Brace 11.5-inch Carbine-Gas 1:8 .223 Wylde AR-15 Freefloat M-Lok Handguard Pistol Full Build Kit

Davidson Defense Strata 11.5 Inch .223 Wylde AR-15 Pistol Full Build Kit with Gauntlet Arms Brace

This full build kit centers on an 11.5 inch KAK Industry .223 Wylde barrel with a carbine gas system and 1:8 twist, built for versatility across both .223 Remington and 5.56 NATO ammunition. The government profile barrel is nitride treated 4140 CrMoV steel, delivering heat resistance and surface hardness that hold up under sustained fire. The upper receiver is machined from 7075 T6 aluminum with an anodized finish, paired with a lightweight 6061 T6 aluminum M-LOK handguard that keeps the front end manageable without sacrificing rigidity. The kit includes a complete bolt carrier group with a 9310 steel bolt head and 8620 steel body, both nitride finished for wear resistance, along with a mil-spec charging handle and a micro low-profile gas block sized at 0.750 inches. The Gauntlet Arms polymer stabilizing brace provides a solid shooting platform, and the GI A2 birdcage flash hider threads directly onto the 1/2x28 muzzle.

Key Features

• 11.5 inch KAK Industry .223 Wylde barrel, carbine gas system, 1:8 twist rate, government profile
• Nitride treated 4140 CrMoV steel barrel construction for durability and corrosion resistance
• 7075 T6 aluminum upper receiver, anodized finish, paired with 6061 T6 aluminum M-LOK handguard
• Complete bolt carrier group with 9310 steel bolt head and 8620 steel body, nitride finish
• Gauntlet Arms high-strength polymer stabilizing brace in black
• Micro low-profile gas block, 0.750 inch diameter, with GI A2 birdcage flash hider
• 1/2x28 threaded muzzle for standard .223/5.56 muzzle devices

Perfect For

• Shooters building a compact AR-15 pistol platform with .223 Wylde chamber flexibility
• Users prioritizing a balanced front end with M-LOK attachment options
• Builders seeking a carbine gas system in an 11.5 inch configuration
• Those wanting a stabilizing brace setup with included core components

Chamber Versatility in a Compact Package

The .223 Wylde chamber specification splits the difference between .223 Remington and 5.56 NATO, allowing you to run either cartridge without the pressure concerns that come from firing 5.56 in a dedicated .223 chamber. The 1:8 twist rate stabilizes common bullet weights from 55 to 77 grains, making this barrel a practical choice whether you're running bulk training ammo or heavier precision loads. The carbine gas system in an 11.5 inch barrel sits right in the sweet spot for reliable cycling without excessive port pressure, and the nitride treatment on the 4140 CrMoV steel adds a hard, slick surface that resists carbon buildup and throat erosion.

Upper and Handguard Engineering

The 7075 T6 aluminum upper receiver brings the strength needed for bolt lockup and pressure containment, while the 6061 T6 aluminum M-LOK handguard keeps weight down where it matters most. M-LOK slots run the length of the handguard, giving you modular attachment points for lights, grips, or bipods without adding permanent rail weight. The micro low-profile gas block tucks under the handguard with a 0.750 inch diameter fit, keeping the profile clean and eliminating snag points. The anodized finish on both the upper and handguard provides corrosion resistance and a consistent black appearance.

Bolt Carrier Group and Internals

The included bolt carrier group uses a 9310 steel bolt head, a material choice that offers superior strength and fatigue resistance compared to standard Carpenter 158 steel. The 8620 steel carrier body is nitrided for surface hardness and lubricity, reducing friction during cycling and extending service life. The mil-spec charging handle provides a reliable grip surface for charging and malfunction clearance, and the micro gas block meters gas flow without the bulk of a traditional front sight base.

Gauntlet Arms Brace and Muzzle Device

The Gauntlet Arms polymer stabilizing brace delivers a rigid shooting platform with a high-strength polymer construction that handles recoil without flexing. The GI A2 birdcage flash hider is a proven design that disrupts the flash signature at the muzzle, reducing visible flash during low-light shooting. The 1/2x28 thread pitch is the industry standard for .223 and 5.56 muzzle devices, so swapping to a different brake, compensator, or suppressor mount is straightforward.

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Verify component compatibility before use

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