Reverese safety

Hey guys, just chucked my gearbox back in my JM gen 9 but for some reason the safety is reversed? Also I’ve lost my single shot functionality? Any ideas? Cheers!

Can’t remember but that has an off centre disk / cam thing to move it. Did you put it on upside down or 90 degrees rotated?

Something sounds like it’s moving back to front or upside down…