Should I do it ?

[josey88]

OK , I have a Nikon scope mounted on a LaRue SPR -1.5 on my flat top AR. Now, mounted like that , at that height (1.5") the Nikon scope hits the front sight square in the middle. I know that I notice it very little , but... What happens if I add a 1/2" rail so that the scope will raise that amount and then clear the sight completely ? my question is to the effect of zeroing and in general ... I know that the scope is suppose to be at an ideal 1.5 inch . Would I be able to calibrate the scope and use the mildot cards as if it were at 1.5" height? Will it make any difference ? I will like someone to reply with detail to this ...!!! Thanks to all ... josey88

[TWR]

Most disagree but I use a LaRue 1.93" mount to run a 1.5-5 Leupold scope. It clears the FSB and works for me. On my 3.5-10 I use the 1.5" mount but use a flip up front sight. I noticed a glare sometimes from the FSB, even though I could not see the FSB.

I noticed the 1.93 mount when used with 1" rings is not quite that tall. In fact it is closer to the Aimpoint mount than the 1.5 scope mount, height wise.

[Damascus]

My advise would be to get rid of that FSB completely, especially since you're using a high powered scope. If you really think you may someday need the FSB, I'd still remove the FSB and save up for a railed handguard and some flip up BUIS.
There's many ways to remove the FSB for optics, the cheapest way is to shave it off with a dremel tool, then repaint it (I'll find you some detailed instructions on how to do this if you're interested), or you could spend $40 and get a gas block (which replaces the FSB altogether), which you could also mount a flip-up front sight to that as well.
As far as raising the scope - no, the mil-dots will range the same no matter how high up the scope is. If you're using the dots for BDC, then you'll need to re-calculate you're range data with the new height entered.
http://www.eskimo.com/~jbm/cgi-bin/jbmcard-5.0.cgi