The cross pin or whatever it's called is too wide to fit in the slots on the gun I wanted to put it on. The cheap Chineseum RDS I bought as soon as I got my Saiga fits on it, as does my SIG Romeo5. But of course the Chineseum one is... Well it cost $40 and comes loose as you shoot. The SIG was a gift and I already have it zeroed for my Saiga. Has anyone else ever encountered a similar thing? The Primary Arms website says it fits Weaver rails too, so it should fit but it doesn't. Could anyone otherwise suggest a good mount that has a better chance of fitting? I was thinking of going to Top Gun and hoping they'd let me check if a mount fits before I buy it, though that seems like it might be a bit awkward.