How do you take hop-up off an airsoft gun M23 PISTOL from just BB guns it has no adjusting wheel and the spin-up is set?

To remove the hop-up unit from an M23 airsoft pistol, first ensure the gun is unloaded and safe. Disassemble the pistol according to the manufacturer's instructions, which usually involves removing the slide and any screws securing the hop-up chamber. Carefully detach the hop-up unit from the barrel assembly, taking care not to damage any internal components. If the hop-up is non-adjustable and fixed, you may not need to adjust it further, but if you want to replace or modify it, follow the same procedure for reassembly with the new part.