I am reworking a P226 which has been sleeping at my LGS. I have several springs for a MK25 in my stock. Are the springs for the two units the same, ie firing pin, mainspring, etc ? I see some differences in parts due to a coating but not in the springs.

The MK25 is just a P226(9) with phosphate coated internals and a chrome lined barrel. Springs are the same.

Thanks for the info. I haven't gotten back to the project yet.