Arachnagrip sent me a set of their Slide Spider, which is like grip tape
except for the rear serrations of your Glock slide. They also make them for other pistols.
XS Suppressor Height Sights
pictured above
I have been dry firing with it since I got its definitely more grippy with either the pinch grip or the full/standard grip used for immediate action/slide racking.
The "spider" part of this product sit inside the rear OEM serrations of the Glock pistol. If you have front serrations you could probably do the same thing with them.
Their spider design is pretty high quality, I do not know if it is a stamp or laser printed onto it? You can add your own custom text or custom logo if you wanted to. I might do one with my logo on it just for chits.