Good looking slide, but a few issues - Alpha Shooting Sports ALPHA Marksman V4 Slide for Glock 17

First off, the machining on the slide is great. No tool marks that I could easily see. It comes with an RMR plate, so if you're still waiting/on the fence about the RMR, it saves you about $30-40, since it's included. Channel liner was already installed.

Second, with a regular length G19 barrel, everything operates smoothly. Throw in a threaded barrel and you start having problems (at least with my Blacklist barrel). Mouth of slide is machined to pretty tight tolerances, and due to the extra weight of a suppressor (I was using a Griffin Optimus), the barrel doesn't have enough clearance to tilt. I've tried it in another slide (from Right to Bear Arms), and everything works fine.

Either way, I kept the slide and simply decided to use it with a non-threaded barrel. It's good looking (albeit subjective), and really have no other complaints other than the incompatibility with the combo of Blacklist barrel/Griffin Optimus suppressor.