Make sure you have a solid set of rings with the DNZ Marlin XL7, XS7 2 Piece Rings. This set of rings comes with 4 screws per ring. From top of receiver at the front to the centerline of the scope tube is .920".

Specifications and Features:
Marlin XL7, XS7 2 piece scope mounts
Long and short action
Low mount
30mm scope tube
Silver
LH or RH
Tactical