So I have an X300T-A and it fits great on my Gen 4s with the U rail. As many know, the gen 5s have a wider P notch, leading to wobble with the U mount. The problem is the P mount extends beyond where the U mount is, but on the glock the extra space is behind the bar. I've started to try shaving the P insert down a bit so I would at least get a snug fit, but now the light doesn't sit right, being angled up a bit and the battery latch protrudes past the bottom of the trigger guard. More probably needs taken off.
Has anyone made X300-As (without the spacer) work on Gen 5s without being extremely loose? Should I just continue trying to "fit" a P insert?