Product Description The PROOF RESEARCH PR15 Steel AR-Style Barrel (MPN 130384) is a precision-engineered rifle barrel built for shooters who demand peak performance from their AR-platform builds. Chambered in 6mm ARC and measuring a full 20 inches in length, this barrel delivers an optimum combination of high tensile strength and requisite toughness to withstand the extreme chamber pressures encountered during firing. Crafted from premium stainless steel, it offers excellent erosion resistance, wear characteristics, and corrosion resistance, making it a dependable choice for competition, long-range precision shooting, and serious field use. The rifle +1 length gas system ensures reliable cycling, while the 1:7.50" twist rate with 4-groove rifling provides outstanding stability and accuracy for 6mm ARC projectiles. A 5/8"-24 TPI muzzle thread accommodates a wide range of suppressors and muzzle devices. Product Highlights Premium Stainless Steel Construction: High tensile strength material delivers superior corrosion resistance and wear durability for extended service life. 6mm ARC Chambering, 20" Barrel: Optimized for long-range precision, providing enhanced velocity and ballistic performance over shorter barrel options. Rifle +1 Length Gas System: Promotes smooth, consistent cycling and reduced felt recoil for improved follow-up shot accuracy. 1:7.50" Twist Rate with 4-Groove Rifling: Stabilizes a wide range of 6mm ARC projectiles for tight groups at extended distances. 5/8"-24 TPI Muzzle Threading: Compatible with the most popular suppressors and muzzle devices available for AR-platform rifles. Specs Brand: PROOF RESEARCH Model: PR15 Steel AR Barrel Series: PR15 Series Caliber: 6mm ARC Barrel Length: 20" Gas System: Rifle +1 Length Twist Rate: 1:7.50" Grooves: 4 Bore Type: Rifled Thread Pattern: 5/8"-24 TPI Finish: Stainless Material: Stainless Steel Weight: 3 lbs. 3 oz. Firearm Fit: AR-Platform MPN: 130384 UPC: 843068130384 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>