I also have my muffler opened up.
Drilled a hole and also opened up the baffle inside the muffler, which was about the same size as the pellet shooter outlet of the muffler.
The US version of the muffler does not have that round pea shooter outlet, but a hole like the one I drilled (but smaller) and a deflector like I have. I just drilled a hole where the US version has it, but larger and then opened up the baffle inside the muffler.
US version:
Drilled a hole and also opened up the baffle inside the muffler, which was about the same size as the pellet shooter outlet of the muffler.
The US version of the muffler does not have that round pea shooter outlet, but a hole like the one I drilled (but smaller) and a deflector like I have. I just drilled a hole where the US version has it, but larger and then opened up the baffle inside the muffler.
US version: