Painted rings on M1 barrel

Noticed in this film painted rings on the barrel of a carbine. (first seen at 0:11 sec) Does anyone know what they mean?

WWII BATTLEGROUND: U.S. Battles Japanese Base at Rabaul, 1943-44 (720p) - YouTube

Thanks, John McP

I think you'd have to ask the owner...

Looks lie an officer. Perhaps the two rings designate HIS carbine....

Probably a way for the owner to visually recognize his carbine amongst a stack of identical weapons. Cowboy Action Shooters will sometimes hang something like a thong with feathers or beads on the 1894 Marlins, since at least 50% of the other shooters have identical Marlins....

Maybe it stands for Jap #1 and Jap #2. The next landing he had a all white rifle.:D

I don't know about the rings but did you notice the No. 1 Mk. III Enfield amongst the Garands at 0:37? ANZAC in the pack?

I don't know about the ring, but thanks for posting a great movie. :)

Maybe a way to tell his from the rest in the rack at a glance but I agree that the more interesting question is how a No.1 Mk III got there.

The anti-tank and AA cannoneers would put rings on thiers for kills , maybe he used rifle grenades to score a couple of tanks.
Chris