Are you wanting a compensator? I'm not a big fan of comped 9mm's. You need to run a really hot load to get the gun to cycle. A couple people at my range shoot 9mm major race gun's but neither is 100%, I have seen them malfunction more then a few times.
You could go without a comp and just lighten the slide, run a light recoil spring 7-8 lbs and light competition main spring with an extended length firing pin. Put a magwell on it and it will be a good budget racer. You would need to reload light loads for it. Felt recoil is almost nothing and just slightly more muzzle flip than a comped gun.
This is the 9mm I did for my daughter.
Here is a quick clip of her shooting smoke and hope so you can see the recoil.