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AR15.COM
3/25/2012 6:33:45 AM EDT
Has anyone drilled the 3/16" hole on their JP Comp for biasing?  If so, is it worth the effort?
3/26/2012 6:59:58 AM EDT
[#1]
I did because I already had the hole on another JP Cooley comp (it came with the hole-pre-drilled) and it was working well for me. I didn't do a "before and after" check so I can't say if it made a big difference. Probably the shooter is the biggest variable - I suggest you shoot it without the hole, watch how your sights move, then drill the hole if you feel it is necessary.
3/28/2012 4:16:07 AM EDT
[#2]
Thanks I will give that a shot.
3/28/2012 5:04:08 PM EDT
[#3]
I drilled mine.  It helps with the rilfes tendency to move away from your support hand.  Start with a small drill bit shoot the gun then move up one size and shoot the gun again and watch the sight movement change.