The profile of these barrels are for Bulgarian rifles.
Made from 4140 1-9 twist Chrome Moly steel and black nitrided inside and out , gas port is not drilled, but is dimpled. The handguard retainer slots and extractor clearance cut has also been done on these barrels.
Made in the USA and Stamped for 922r Compliance. These barrels are made from Montana Rifleman blanks.