I wouldn't attempt to "bend" or "peen" tempered steel. It could decide to crack vs. bend, even if you don't notice it right away. After many therapy sessions, I finally surrendered my "tight slide" OCD.
As long as it shoots well, I'm ok with it. If you require a tight slide fit, I'd get a pistol that's already cut for it from the factory
As long as it shoots well, I'm ok with it. If you require a tight slide fit, I'd get a pistol that's already cut for it from the factory