I run a 300U on a KAC RAS and it's TIGHT.
I guess it's normal. I can smack it on with my hand but I have to pry it off.
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I run a 300U on a KAC RAS and it's TIGHT.
I guess it's normal. I can smack it on with my hand but I have to pry it off.
My X300U mounts easily to my LMT MRP Piston's rail.
Could be that the picatinny rail is out of spec. I've seen some from 'quality' mfgs that were oversized and some accessories wouldn't fit properly. Or maybe the X300U needs some adjusting. My X300U slides onto my MRP easily...haven't even tried it on any others.
I assume you have the right key insert and rails on the light?
I run x300's on all my rifles. Each one was a bear to get on. Pounded the shit out of them to the point of wondering if I would break them. Anyone had the pleasure of removing one that was diff. to put on?