Thanks for the additional information. I currently carry a P365, and am seriously considering the P365XL as my first optics-ready pistol. I like the similarity with the P365 that I already like, but do not like the fact that removing the plate to expose the optics mounting system also removes the rear sight. So, unless the rear sight built into the optic proves to be the correct height, this could compromise the backup sighting system. The Hellcat mounting plate does not include the rear sight, so mounting the optic leaves the rear sight in place. A package that is comparably sized to my P365 but has one extra round in the magazine has me intrigued, but I would not change solely on that basis. The experiences of others with the gun as a whole are much more important.