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AR15.COM
10/18/2010 1:20:01 PM EDT
I noticed when shooting today that my Surefire X300 has some back and forth play when on my 17. Im using the U latch plate and made sure all of the screws are tight. Any ideas?
10/18/2010 3:11:17 PM EDT
[#1]
Put some masking tape around the part that locks into the slot on the glock rail.

Works like a charm!  I've had it happen on mine too, its very common.
10/19/2010 5:53:49 PM EDT
[#2]
The play is coming from the U locking plate. I can move it back and forth with my fingers when its not mounted on the pistol. I threw some blue painters tape on it and its on there tight now. I have a email in to Surefire to make sure its normal.