2 questions please. Will the comp work well on the scorpion pistol? Does it just screw on? Thanks.
Compensator should just screw on, need to be mindful of the timing (shims or crush washer might be needed). Newer version of the Scorpion is 1/2x28 . Old version is metric.
Regarding whether or not they work, I can't really tell the difference since there isn't much gas in 9mm cartridge to effectively use the baffles. What you notice during firing is the massive bolt moving back and forth, and not much can be done with a lightweight gun like the Scorpion.