This has likely already been asked but I can't find it.
I'm gonna show my ignorance on a question I feel like I should know the answer to: Why don't the rail on the flat top upper receiver (for the rear flip up sight) and the rail on the front gas block (for the front flip up sight) on my AR-15 upper line up? I'm not a physics professor, but it just seems like it would make more sense if they were on the same plane than being off for a few degrees, no? The rail on the front gas block looks a fair bit shorter in height than the railed upper receiver and I was just curious as to.... why?
Maybe it's an optical illusion but I'm pretty sure the front rail is lower. Any insight is appreciated.
I'm gonna show my ignorance on a question I feel like I should know the answer to: Why don't the rail on the flat top upper receiver (for the rear flip up sight) and the rail on the front gas block (for the front flip up sight) on my AR-15 upper line up? I'm not a physics professor, but it just seems like it would make more sense if they were on the same plane than being off for a few degrees, no? The rail on the front gas block looks a fair bit shorter in height than the railed upper receiver and I was just curious as to.... why?
Maybe it's an optical illusion but I'm pretty sure the front rail is lower. Any insight is appreciated.