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Page AR-15 » Optics, Mounts, and Sights
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Archived [ARCHIVED THREAD] - A2 sight in problems
Posted: 9/18/2009 8:00:39 PM EDT
I have a RRA 20" A2 upper that I put on a DPMS lower and I went to sight in. The front sight is bottomed out in the base and it is still shooting about an 1.5" low at 25yds. I have to move the rear drum to 500 to get it level. The front base is stamped with an M and an F and the rear drum is the 800 meter. I have read that this is an incorrect combination. Is this right? Do I need to change the rear drum or just file the front sight.? thanks for any input.

Link Posted: 9/18/2009 8:19:57 PM EDT
[#1]
These threads should help you.

http://www.ar15.com/forums/topic.html?b=3&f=18&t=460190

and

http://www.ar15.com/forums/topic.html?b=3&f=18&t=328143
Archived [ARCHIVED THREAD] - A2 sight in problems
Page AR-15 » Optics, Mounts, and Sights
AR Sponsor: bravocompany
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