Proof Research PR10 Stainless Steel CamGas 20in 6.5CM Rifle Length plus 2in Rifle Barrel 264cal 0.875GB 8 Twist 5/8 x 24. 5CM Deepfeed Rifle Barrels take your next modification or build out to the next level. These AR15 Barrels from the trendsetters at Proof Research feature lightweight construction that blows traditional models out of the water. With extreme temperature resistance Proof Research PR10 Stainless Steel CamGas 6.5CM Deepfeed Rifle Barrels can withstand repeated use and firings. Thanks to unprecedented durability this aftermarket accessory features top-rated aerospace-grade construction. Improve your performance and reliability with the PR10 Stainless Steel CamGas 6.5CM Deepfeed Rifle Barrels. Specifications for Proof Research PR10 Stainless Steel CamGas 6.5CM Deepfeed Rifle Barrels: Manufacturer: Proof Research Color: Silver Fabric/Material: Stainless Steel Caliber: 6.5mm Creedmoor Barrel Profile: Contour 0.875GB Gas System Length: Rifle +2 Length Gas Block Journal Size-Diameter: .875 in Threads per Inch: 5/8x24 Barrel Twist Rate: 1-8 Flutes: No Condition: New Features of Proof Research PR10 Stainless Steel Rifle Barrels 2SB-BRI-PR10SSCGC Lightweight Extreme Temperature Resistance Unprecedented durability Package Contents: Proof Research PR10 Stainless Steel CamGas 6.5CM Deepfeed Rifle Barrels 2SB-BRI-PR10SSCGC Proof Research PR10S200264FBB8B65CM: PR10 Stainless Steel CamGas 20in 6.5CM Rifle Length plus 2in Rifle Barrel 264cal 0.875GB 8 Twist 5/8 x 24