The BI, B1 W-I And I-I marks in the pictures by Garandrew and Mikey 51 are the marks aplied by the maker of the cas cylinder not the maker of the barrel. I am at work, so I cant check my referances, but I believe Garandrew's barrel is an Inland not BLC barrel because BLC started making barrels in about June or July '43 and the font on the INLAND MFG. DIV./ GENERAL MOTORS is wider and flater. They were markes BI on the barrel flat on the bottom behind the gas piston.
Hope this helps to clarify Inland vs BLC
Dave
Information
Warning: This is a relatively older thread
This discussion is older than 360 days. Some information contained in it may no longer be current.