Optic sight screw size

[P13]

Anyone know the size of the screw required to hold the fibre optic rear sight onto a we slide? Managed to lose mine yesterday. I’m sure @rocketdogbertcan help here as he is the glock guru

 

[Guest]

Tricky. I think is an M4 I’ll check when I get home

 

[P13]

I was gonna say m3 but I don’t have access to anything that size at the minute