I decided to give up on having my Gen 4 slide to be milled to have the Gen 5 bull nose to have the Gen 5 PMM Comp fit properly. After speaking with a few milling companies, they say they would have to do it to a blank slide. The cost doesn’t outweigh the benefit. (Just gives me an excuse to get a Gen 5 at some point, lol). Instead of me buying a completely brand new slide and having it milled to the way I want, I’m going to send my factory 19 slide to a company and have it milled to a decent design that I like, get it milled for an RMR, also having the rear irons moved to the front of the RMR. As for the exact comp...I’m still trying to decide. I have thought of the Agency 417 also. I’ve been trying to think of the extra cost of the Agency comp is worth it?! Especially with the reviews of the TBRCi Stubby comp has good reviews and is about half the price.@Will555 I forgot to mention the agency arms compensator, the cool part is that you can put the front sight on the compensator meaning its much more stationary and longer sight radius