I have an older mossberg 22 that my deceased father gave me. Instead of a scope I would like to mount some type of rear apeture or Ghost ring sight that mounts to the slots that are milled in the sides of the receiver for mounting a scope. Is this possible and if so what would you suggest. I want to use it in a cowboy rifle silouette match that defines the rifle as being a lever action, semi-auto or pump 22 with the stipulations that it must have a tubular magazine and metallic sights. My mossberg has a tubular magazine. Shots will be from 40 to 200 yards. I'm all ears!!

There are Williams 5D sights made for flat-sided receivers, I'd get one of them and drill new holes in it to match the holes in your receiver. I've used one on a Marlin Model 60 and it worked nicely. The "5D" name comes from being a $5 sight in the long-dim past, they are not $5 any longer.

Check out the Numerich gun parts website. You may be able to replace the original sights that came with the rifle.

Just an " FYI ": You might checkout the below links.

Mossberg Info:
http://home.epix.net/~damguy/

General Message board for Buying / Selling / General Information:
http://boards2go.com/boards/board.cgi?&user=damguy

PAPI

I'd check with these folks first:

http://www.havlinsales.com/22rifle.htm

What model is your Mossberg?

+1 on Havlin; some Mossbergs have aperture sites that swing out of the way... nice for when you are switching to a tip-off scope and just plain cool. Try to get an original set made for the rifle model.

88,
Your rifle is probably drilled for a receiver sight. The older swing away sight mounted in two hold about 1.5 inches apart and they were 6-48 thread I think.
The later Mossbergs had 2 holes much closer to gether and were 8-40 threads.

check Williams for the later sight and Ebay for the earlier sight.