BRAND NEW BARRELS CHAMBERED IN .277 FURY FOR AR 10S!! FIRST OF ITS KIND! CBC INDUSTRIES 16" SPIRAL CUT STEEL WITH 1:7 TWIST! BULK DISCOUNTS. These are rated for standard loads not high pressure! These barrels have been sent to me from an AR10 Manufacturer on consignment. I know nothing about the specs other than what's listed. They are for AR10 and are sold as is. No refund. I can't verify tolerances, head spacing or anything else. Literally have 400 plus to get rid of since they needed a high pressure barrel capable of 120,000 psi or more. They are in sleeves but could get rust spot in the indent on the bare metal, but they have not been used. Please understand I am only the middle man. These retail around $300 a barrel and are special order, these are not sold anywhere else! Manufacturers call me for bulk orders. We will sell these in bulk discount rates.