My Turnbull Win/Miroku came D&T for a receiver (Turnbull) mount for the red dot. So, nothing happened to the gun there. The advantage of the red dot is for hunting, not target shooting. It’s much easier to see it in dim light. I have Sharps rifles that have aperture sights and they work great for target if you’re shooting long distances. I’ve also had them on my 1885 High Wall. One size doesn’t fit all. Woods hunting with the 1886 and a red dot has proven advantageous and the red dot will shoot as good a group(s) as the gun is capable of even compared to a scope.
These groups were fired at a measured 114 yards, my camp deck to the back stop. Burris FF3.
Oddly enough I’m not speaking from ignorance or even informed dislike of a dot sight. They have theit place and I have a few of them on various firearms like my MP5;
and my Uzi;
But to be honest that’s mostly because their receiver peep sights are fairly poor, they don’t make a tang sight for them, and a larger reflex sight starts to impair the handling.
On a lever gun, a dot sight is not as detrimental to handling as a scope but I still prefer the tang sight.
Accuracy wise, I consistently shot 1 MOA slow prone sling supported groups with the receiver sights on my M1A Supermatch and with the AR-15 service match rifle that I subsequently shot. I could not have gotten that accuracy with a dot sight and unfortunately most of them seem to have 2 MOA, or 4 MOA dots that compromise accuracy from the start.
My 1926 Model 94 26” rifle has a vintage tang sight in it with a nifty aperture that lets you use a larger aperture for low light conditions;
Or flip to a smaller aperture better suited to bright light conditions.
I also have a different style vintage Lyman tang sight on one of my other pre 64 Winchesters that uses apertures that screw in to the sight elevator. In this case I‘m using a Merit ”Hunter” adjustable aperture that lets me select 11 different settings for aperture diameter to match the lighting conditions.
I can also remove the aperture entirely and use the hole in the sight elevator as a “ghost ring“ aperture. If I have enough light to see the target (moonlight is usually enough) I can see the front sight in the center of the ghost ring aperture - without having the dot potentially wash out the target and without having to adjust the brightness of a dot.
It also works really well on fast movers at short range.
So, it’s not that I don’t like a decent red dot sight (one that doesn’t have a lot of parallax, which by the way all tang sights and aperture sights are 100% parallax free), it just that I seriously don’t see any advantage to one over a good tang or receiver sight when there is one available for the application.
With the exception of a Winchester 94 Classic that has a Williams receiver sight, all of my center fire lever guns have tang sights. About half of them have vintage Marbles or Lyman sights, while the other half have the current Marbles or Lyman tang sights. All but two of my rimfire lever guns also have tang sights. One of those exceptions has a Skinner receiver sight and the other has a 2-7x32 scope.