For the MKII you get the power block and 720 Plenum as a set in the upgrade kit at Utah Airguns.Where can you get just the power block? I already have the power plenum on my MK2.
@RodmarThank you, I two years old M3 so no power block.
I have good results with pellets, just try to make sense changing to slugs or just getting a new Slug rifle!