Rock Ola barrel ??'s

[Sunray]

B&P Motor Sales didn't stamp with just a 'B'. It was 'BI' on the swaged gas cylinder.
Apparently, Rock-ola didn't date their barrels either.
The U.S. Caliber .30 Carbines - Barrel Manufacturers

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[rcycles45]

Apparently, Rock-ola didn't date their barrels either.

Rock-Ola Dated Barrels up to 6-43 . The earliest I have seen and have is 11-42 on a 16629xx

[W5USMC]

That is definitely a B on the gas cylinder, maybe a light strike on the I, so light that it is missing? According to WB Inland sent 2215 gas cylinders to Rock-Ola in 1943.

[painter777]

Thank You RC

According to WB Inland sent 2215 gas cylinders to Rock-Ola in 1943.

Thx for the leg work Wayne , though we have no way to know if Inland sent their own made gas cylinders and or some from the Sub Contractors who also made Cylinders for Inland... like BI, RI, SI or WI.

Now I've been looking over the ROCK-OLA stamp on the barrel in the auction above and question it.
A few things jump out at me when compared but I don't want to say just yet.

This Pic from Jim M's site:


Auction RMC barrel:



Sorry I don't have the skills to do a side by side comparison pic.
Maybe USGI BOB will help if he stumbles by this.