PROOF Research 100387 PR15 Stainless AR-Style Carbine Barrel, 1:7 Twist

Proof Research 100387 AR-Style Barrel 223 Wylde 11.50" Rifle Length Gas System 1:7" Twist 4 Grooves, 1/2"-28 tpi, Stainless Stainless

The PROOF Research 100387 PR15 is an AR-style barrel designed for .223 applications and demanding shooting environments. Built from stainless steel, this rifled barrel combines high tensile strength with the toughness needed to withstand the extreme chamber pressures encountered during firing. Its durable construction makes it a dependable choice for builders, gunsmiths, and firearm enthusiasts seeking a precision-oriented replacement barrel for a compatible AR-platform configuration.
The barrel features a 1:7 twist rate and four-groove rifling to support consistent projectile stabilization across a suitable range of bullet weights. This configuration is intended for users who value repeatable performance, controlled accuracy, and a rigid barrel structure. The carbine-length format is suited to compatible AR-style builds where a compact, practical barrel configuration is preferred.
PROOF Research also engineered the 100387 with excellent erosion wear characteristics and corrosion resistance. These properties help the stainless barrel withstand the heat, pressure, and repeated use associated with regular firing while supporting long-term serviceability when properly maintained. A threaded muzzle configuration is included for compatible accessories, with a 1/2-28 thread pattern.
Whether used for a new build, a restoration, or a replacement project, the PROOF Research 100387 PR15 provides a strong combination of material performance, rifled-bore consistency, and practical AR-platform compatibility. Verify chambering, gas-system requirements, receiver compatibility, and all applicable regulations before installation. Professional gunsmith installation and proper headspace verification are recommended to help ensure safe and reliable operation.

Features:

• Brand and Part Number: PROOF Research 100387 PR15

• Caliber: .223

• Model: AR-style barrel

• Twist Rate: 1:7

• Bore Type: Rifled

• Finish: Stainless steel

• Barrel Type: Carbine length

• Muzzle Thread: 1/2-28

• Construction: High tensile strength with toughness for demanding chamber pressures

• Durability: Excellent erosion wear characteristics and corrosion resistance