A lot of rifles have been rebuilt, Particularly Vietnam period rifles. Commonly the barrels have been changed. Some samples of markings observed on replacment barrels involve: I have viewed good benefits with electroetching. It does get some practice to obtain the depth uniform. I believe the stencils are a single https://coltcombatunitrailgun4567889.izrablog.com/31815049/5-easy-facts-about-colt-combat-elite-commander-45-acp-described