Boomer
Most tritium front sights do not have the front vial at the top of the post, it’s generally down a bit in the blade. The two vials in the ghost ring on the rear are centered in the middle of the ring - in the few sets I’ve played with.
Most of us were taught to shot over the tip of the front sight and center up the sight picture through the rear sight.
Using the tritium vials - your sight picture changes slightly as your aim point references change slightly with location of the front sight glow.
At MOA of living room - probably not an issue, but the error will be there as you go out further in range, but you’re not going out far in range, if it’s dark enough to need the tritium.
The front sight “post” is also typically a flat squared blade to hold and protect the vial, and not tapered. IMLE - past 150 meters, yards, whatever - the width of the blade starts to cover up more of the target than I like. If I was going to run tritium on an AR - it would be a house gun only...with a Surefire.
YMMV
