Not neccessarily, I've got a 20" CL bbl with 1:9 twist and the ONLY markings on it are " E3 **** " stamped on the left side about 3" from the chamber end. I haven't dug anything up on either the E3 or the astericks, but if anybody else has a chance to get one- they're great bbl's.
Rednecks... Keeping the woods critter-free since March 2, 1836. (TX Independence Day)
I'm going to use the words "clip" and "Long Colt" every chance I get. It grinds my gears to see new members attacked when we all know dang good and well what's being refered to.