Screw length to fit NF Ultralite mount?

[Chicory01]

Hi all, I am trying to mount a Nightforce Ultralite 1 piece mount to my Bergara HMR 14 and noticed the usually 6-48 screws are far too short to reach the base. Does anyone know what length and type of screw is needed for this task?

Thanks!

 

[Chicory01]

Bump

 

[Trigger Monkey]

Not for nothing but have you tried contacting Nightforce?