Quoted: Well for my very 1st post here, I have a ugly problem (ok...ugly to me)
I finally picked up a AR15 after waiting several years. I got a Bushy Carbon-15 M4 flat-top (yes, after the fact I found this forum and too late figured out I may have made a huge mistake) to plink with.
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??? No, not at all a mistake. Most of us here feel that the flat top is the best of both worlds since you can have a carry handle for irons, but you can pop that off and use a scope.
So, now that I'm thinking of putting some sort of scope on the thing, I forsee a rather large problem. With the flat-top M4 config, how do I mount the scope high enough to clear the front sight posts and not need a chiropractor afterwards. I have looked around the web at different options and the one that I know will clear is the YHM see thru 3-rail riser but damn if that dosent look real tall, hence the pain in the neck. Another option is a 1/2" spacer and tall rings....but will that clear? I'm not worried abotu physical contact between the scope and the front post, but what the post is going to do to the sight picture at 4x magnifcation. Then again, is this even a problem?
Need some advice here guys, this looks like the place for it.
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Your concerns are VERY unfounded. These "issues" have been long addressed for us AR15 owners, and there are several options to choose from ranging in price from $55 - $215 and then some.
If you're never going to remove the scope (or don't mind having to re-zero afterwards) you can do the 1/2" riser and somewhere between 1/2" and 1" tall rings.
There's the one-piece alternative from Armalite, RRA, LaRue, and others. For the most part, these will return to zero when removed and replaced on the same rifle in the same spot. Funny thing, ability to return to zero appears to be directly related to the cost of the mount
The more it costs, the better it returns to zero.
Keep in mind that although people will tell you "same height as irons" for the Armalite, it's really a TINY bit low for a lot of folks at only 1.2" above the flat-top, and will put the front sight smack dab in the center of your optic glass. RRA, ($50) LaRue ($195 -$215) and most others will go about 1.5" or 1.6" giving you a little more height and comfort.