Modifying Fixed Sights on Service Pistols

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Mr. Mosin

Mr. Mosin

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As the title says. Something like a TT-33, or a Yugo M70A/58A/88A, wouldn't significantly lowering the rear sight raise the point of aim/impact ? I love the looks, I just hate that ghastly tall rear sight. An inch or two of shooting high is irrelevant, but if knocking the rear sight down to the level of a 1911 or other "hump and bump" iron sights would make it shoot 1 foot high at 7 yards, I'll leave it be.

Also, something like the above, taking a file (or mounting it in a milling machine) and widening the rear sight notch, just a hair; to add acquisition ? I just gave issue with using service steel on steel iron sights. I'm not concerned with driving tacks at 100 yards with a service gun; the most I'd use em for is plinking or woods carry at ~15 yards. Maybe CCW.
 
I'm no expert, but I think the only issue with widening the notch would be the possible increase in horizontal drift. Also, if you did not widen it evenly you could cause it to shoot right/left when you have the correct sight picture.

As far as aquisition with a wider notch is concerned, someone more knowledge will need to chime in. Notch width isn't something I've ever tested for that, and I mostly rely on the front sight when shooting close and fast.
 
There's actually a series of (3?) different height rear sights for the TT-33/clones.

If it's shooting high, you could lower rear sight. Trial & error with a file, preferably on
range where you can stop before it's too late :eek:

Widening the rear notch will gett the sight picture faster, but may reduce
precision.

On my Romanian TTC clone, the problem was a miniscule rice-grain front sight.
Asked my HVAC contractor, and he silver soldered a blob on it. I worked it down
to a sane dimension, and it actually came out great, for easier/faster sighting.

PS: The T-33/clones lack a firing pin safety, so not greatest choice for CCW.
The 7.62x25 tends to penetrate for days, too.
 
Widening the rear sight will likely slightly increase the horizontal dispersion on the target. As long as it's not taken to the extreme the practical effect will likely be small.

At 7 yards, assuming a sight radius of 6", then for every 0.024" (0.605mm) you lower the rear sight, the point of impact on the target will drop 1 inch (25.4mm).

If the gun is already shooting to point of aim, you're not going to be able to change the height of the rear sight very much without really moving the point of impact significantly. Let's say you want to reduce the height of the sight by a quarter of an inch--that will change the point of impact by 10.5 inches on the 7yd target or about 22.5" on a 15yd target. Even an eighth of an inch of rear sight reduction will move the point of impact by about 5.25" on a 7yd target--or about 11.25" on a 15yd target..

Another option would be to reduce the height of both the front at rear sight by exactly the same amount. That would have a neutral effect on the point of impact. There is a practical limit to this as the front sight isn't very tall to begin with.

I would leave it alone.
 
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