[SgtStash]

My brother in law has the x5 It came with the 4 magazines which is a huge plus in my eyes. I just purchased the x5 X-change kit. It came with the Tungsten grip and has both recoil springs but only two magazines. I have a regular FCU from my subcompact 320. Honestly for the price of the xChange kit from sig it was worth it. I think it feels better than my brother in laws X5.

 

[SgtStash]

I just got a new x-5 x-change kit and I'm trying to figure out what size screw to use on the smaller outer most holes for RMR/holosun. Any ideas? its not 6-40

No idea sorry! I haven’t planned on mounting an optic yet.