Is is the anti reversal latch or the cut off lever?

[makkerjani]

Hi guys, lately i've been having issues that my DBoys M4 fires automatic while in semi-auto mode. I disassemblied it and after taking my gearbox apart i found my anti reversal latch's spring was broken. So now i'm ordering a new one, and i'd like to ask if i should look for the cut off lever or this made the problem with the Auto/Semi-auto?

[RainyEyes]

Cufoff lever. AR just stops the gears from rolling backwards and pushing the motor backwards as well. The cutoff is the thing you need to look at along with the selector plate.

[makkerjani]

OK, Thank you!