The journal size option is for if you have an oversize trunnion. Standard size is .8675" The oversized barrels have the turnnion journal .0025" to .003" oversized.
Made from 4150 1-8 Twist Chrome Moly steel and "Chrome Lined" complete , Gas Port drilled. The handguard retainer slots and extractor clearance cut has also been done on these barrels.
Made in the USA and Stamped for 922r Compliance.
This item is made in the United States and counts as a 922r compliant part.