Nice product but i'm having issues - ZEV Technologies PRO Glock V2 Compensator

Purchased this for my Poly 80 G19 build. I've been having issues with the build so I just got around to installing this Compensator now that they gun is working well. For some reason this doesn't fit on my S3F barrel. It hits the shoulder 1/4 of a turn short of fitting upright and backing it off the 3/4 of a turn to fit it right is way too loose for comfort in shooting. Unfortunately I'm past the 30 day return period so I need to figure out if the Compensator has an issue or I need to purchase a different barrel.

Overall, it looks nice and seems like a quality piece. Obviously I can't speak to the functionality of it. Just be cautious of the type of barrel you have and fit it right away in case you need to return in.