Since apparetnly your rifle's prepped for a tang sight, your might want to take into consideration a viable option, depengunt upon your intended use for the rifle.
That option would be to have TWO zeroes for the rifle, for which [b[both a tang peep sight & a folding rear bbl sight is needed, but an issue-height front sight is used:
The first zero could be for a relatively short-range (say, 50-75 yds) for the open/iron barrel sights.
The 2nd zero would be for a somewhat longer range (say, 150-200 yds) for the tang peep sight.
In actual use, I hunt/stalk with the tang sight folded and the rear bbl sight "up", in case a shot @ game suddenly presents itself fairly close.
If/when a longer shot @ game is presented, I've found there's usually ample time to fold the bbl sight & raise the tanger (at the same time, one with each hand) for the shot.
I say "one with each hand" because I generally stalk with one hand on the forend near the rear bbl sight, and the other on the stock's wrist near the tang sight - If someone is coodinated enought to grasp an ice cream cone with both hands & bring it to their mouth w/o slamming it into their forheads, the action should be a snap to perform.
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