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- Jun 20, 2025
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Howdy,
The FPC has just a top picatinny rail, and after market sights are required. I've installed a 25mm red dot sight on it, and zeroed it over several range visits to a 20-1/2 to 85 yard zero.
I think red dots are probably reliable enough these days that the majority of pistol caliber carbine shooters are OK with just the red dot sight or optic by itself. I tend to over-think things, and so I wanted to have back up iron sights too. So I've installed a set of Magpul MBUS 3 flip-up sights at the longest possible sight relief. They stay folded down and reasonably unobtrusive until I need them, which is hopefully never. But now I've got to go ahead and zero the aperture windage and front post elevation.
Is there a quick and dirty method for getting this in the "ball park" using the red dot sight? I mean, as a sort of "co-witness" can I switch on the red dot, and then align the front post with it as a rough equivalent before the switching it off and zeroing things at short range on a target and the walk it up at progressively longer ranges? I've got plenty of ammo, it's just the time issue.
Thanks for any insights you might have on how to proceed.
The FPC has just a top picatinny rail, and after market sights are required. I've installed a 25mm red dot sight on it, and zeroed it over several range visits to a 20-1/2 to 85 yard zero.
I think red dots are probably reliable enough these days that the majority of pistol caliber carbine shooters are OK with just the red dot sight or optic by itself. I tend to over-think things, and so I wanted to have back up iron sights too. So I've installed a set of Magpul MBUS 3 flip-up sights at the longest possible sight relief. They stay folded down and reasonably unobtrusive until I need them, which is hopefully never. But now I've got to go ahead and zero the aperture windage and front post elevation.
Is there a quick and dirty method for getting this in the "ball park" using the red dot sight? I mean, as a sort of "co-witness" can I switch on the red dot, and then align the front post with it as a rough equivalent before the switching it off and zeroing things at short range on a target and the walk it up at progressively longer ranges? I've got plenty of ammo, it's just the time issue.
Thanks for any insights you might have on how to proceed.
