The only one I've used is the one from Dueck Defense that has the front/rear sights as well. It's a good mount. Puts optic a little higher but it zeroed fine and rock solid. Can't speak for the others.
For less than $20 it's worth a shot.
I went similar route to try optic on handgun out before went with milled slide to make sure I liked it and could shoot with it.
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