Hi folks,
I found my next SMLE refurb candidate, and I can't find the meaning of this marking, a large "U" with a broad arrow in it. I looked on Amatikulu's excellent website with no luck. Thanks for any input!
https://www.milsurps.com/images/impo...5b4d4ce1-1.jpg
As an bonus picture just for fun, here's one of the back of the receiver:
https://www.milsurps.com/images/impo...15a16dba-1.jpg