Proof Research 11.5" AR-Style Barrel .223 Wylde, Rifle Length Gas, 1:7 Twist, 4 Grooves, 1/2"-28 TPI, Stainless Steel

The Proof Research 11.5" AR-Style Barrel in .223 Wylde is a precision stainless steel barrel built for shooters who want a compact, hard-hitting setup without sacrificing accuracy. Whether you're building a short-range tack driver, a home-defense AR, or a lightweight truck gun, this barrel delivers the velocity and repeatability you need in a handy 11.5-inch platform. Chambered in .223 Wylde—the chamber that shoots both .223 Remington and 5.56 NATO safely and accurately—it's flexible ammunition-wise and proven across countless hunting and target applications.

Proof Research's barrels are known for consistency and reliability. The 1:7 twist rate is a versatile standard that stabilizes a wide range of .223 projectiles, from varmint rounds to heavier match-grade ammunition. The rifle-length gas system paired with this short barrel keeps gas tube angles reasonable and dwell time manageable, promoting smooth cycling and longevity. Four-groove rifling maximizes bearing surface and heat dissipation, especially important in a compact barrel where heat buildup can be a concern during sustained fire. Threading is 1/2"-28 TPI, the industry standard for .223 AR platforms, giving you broad suppressor and muzzle device compatibility.

Stainless steel construction resists corrosion and maintains accuracy across temperature swings—critical if you're taking this barrel from a climate-controlled range to the field or storing it long-term. At just 1 pound 8 ounces, this barrel won't bog down your AR build, making it ideal for shooters prioritizing lightweight handling without sacrificing precision or durability.

Key Features

• Stainless steel construction for corrosion resistance and thermal stability
• .223 Wylde chamber accepts both .223 Remington and 5.56 NATO ammunition
• 1:7 twist rate stabilizes a versatile range of bullet weights
• Rifle-length gas system tuned for 11.5-inch barrel dynamics
• Four-groove rifling maximizes contact and heat dissipation
• 1/2"-28 TPI threading for suppressor and muzzle device compatibility
• Lightweight at 1 lb 8 oz for compact, maneuverable builds

Specifications

Frequently Asked Questions

What ammunition does this barrel shoot?

The .223 Wylde chamber is safe and accurate with both .223 Remington and 5.56 NATO ammunition, giving you flexibility at the ammo counter. The 1:7 twist stabilizes bullet weights across the full range of common loads.

Will this barrel work with my AR-15 platform?

Yes. This is an AR-style barrel with standard 1/2"-28 TPI threading and rifle-length gas port, compatible with mil-spec AR-15 upper receivers and assemblies.

What suppressor and muzzle devices fit this barrel?

The 1/2"-28 TPI thread pitch is the standard for .223 AR platforms. Any suppressor or muzzle brake threaded 1/2"-28 will fit.

Is this barrel good for precision shooting?

Proof Research barrels are manufactured to tight tolerances. Stainless steel provides thermal stability, and the four-groove profile supports accuracy across extended shooting sessions.