Womens Trademark T-Shirt - Womens Tshirt Dark Heather Gray W/ Brownells Logo Lg

These are produced with the same chamber as our Spec. MK12 barrels with a slightly heavier profile. Built for reliability and accuracy. Best option for long range, high precision shooting. Available in both 14.5" and 16.1" lengths. If no barrel nut is chosen when ordering a pinned gas block, we will leave the taper pin slightly out for ease of removing to install your barrel nut. Taper pin must be re-installed in the same direction it arrived, and then set fully into place.Features: Barrel Extension: M4 Feed Ramps Chamber: Optimized for use with MK262 (Black Hills 77gr equivalent) Twist: 1 in 7 right Hand Centurion Arms barrels serve as HBAR barrels Centurion Arms barrels require no further break in Requires gunsmith installationSpecifications: Color: Stainless Finish: Stainless Fabric/Material: 416R Stainless Steel Cartridge: 5.56mm Gas System Length: Mid Length Threads per Inch: 1/2x28 Barrel Twist Rate: 1-7 Barrel Material: 416R Stainless Steel Weight: 14.5in 2lb 3.7oz 16.1in 2lb 5.6oz