Troy BUIS help?

[USP]

Hey ive been trying to line up my Troy buis front and rear. Rear is fine. Currently at 25m gun is shooting about 5-7 inches low. Rounds are 55. FMJs. Group is ok, just low. Is it normal for the BUIS to require this much adjustment? I think its one full turn clockwise for each 2 inchs at 25M. Is it cause the sight radius is short cause its a 10.5? Or is point on impact alittle low cause its to close? ANy suggestions? Thanks

 

[KevinB]

What upper and what rail?

I've used them on a 7.5" gun -- the distance in not the issue

 

[USP]

LMT Monolithic CQB 10.5 upper. BOth BUIS are at either ends of the rail. Rail extends to the flash hider.

 

[KevinB]

Well its not unheard of to have sights that are out --
I cant recall the screw pitch / adjustment for the Troy's
Try that -- worse case you'll have to shoot another group or two...

 

[USP]

^thanks, ive got a case of ammo to get things sorted out later on tonight.