>>64077568
Jarvis Customs does coating for 150 dollars. Used to be 125 dollars. Gunbroker you can get px4 parts kits (everything but the frame) for sub 200 dollars, 9mm compact slides might go for a little more.

They do DLC, CrN. This is a PX4 slide with CrN coating. The barrel is NP3’d from Langdon. You have to strip and clean the slide yourself, they will do the final prep but ask for a diassembled slide.