Is it possible the front sight is intended for a rail gas block, not a handguard rail? How different are the front and rear sight heights measured from the rail? Not post and aperture, the entire sight.
By the way, a 25 yard zero crosses the sight line again at 400 yards. The height of the sights over the bore makes an AR entirely different from an M1/M1 Carbine.
Andy
Last edited by AndyLate; 10-17-20 at 19:22.
If BCM can get it zero'ed at 25 with different sights, then I am sure DD will get the problem sorted. DD are great sights.
Andy
Just to clarify, are you trying to get point of aim to match point of impact at 25 yards? If so, that’s not typically how it is done.
RLTW
“What’s New” button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
1.5" low at 25 yards is basically a 100 yard zero on an AR because of the sight height over bore. A 25 yard zero requires a pretty steep trajectory and the POI would cross the POA again at 400 yards.
All academic, I would be displeased if I had to bottom out the front sight to zero at 100 yards. Hopefully DD takes care of you.
Andy
Last edited by AndyLate; 10-19-20 at 06:51.
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