I'm pretty sure that's going to be chambered for 8mm...looks like the Egyptian markings again so it'll be a Hakim. Yes, they made the AG42b in 6.5x55 as well, and I think these were also made in 7.62X39 as a later project...a conversion...by Egypt. The Rashid, but they're different. Apparently they also made a few in 7.62 x 51 but only a dozen or so.