Parallel axle mounting rail clamp

A clamping device for a weapon accessory rail of a type having an elongate mounting structure of generally T-shaped cross-sectional shape, the clamping device comprising:

• a mounting base including a first clamping surface for engaging a mounting surface of the mounting structure, said mounting base further including an outward facing surface opposite the first clamping surface for attaching an accessory device thereto and a hook disposed on a first transverse side of the mounting base, the hook configured to engage a first transverse side of the mounting structure;
• a pressure plate slidable with respect to the mounting base, the pressure plate received between first and second arms, said first and second arms axially spaced apart and extending from the mounting base on a second transverse side of the mounting base opposite the first transverse side of the mounting base;
• a cam member having a lever attached to a cam body, said cam body pivotally mounted between the first and second arms;
• said cam body bearing against said pressure plate to cause sliding movement of the pressure plate in response to pivoting movement of said lever;
• and
• a locking tab slidably attached to the pressure plate, said locking tab slidable between a locked position and an unlocked position, the locking tab having a lip engaging the cam member to prevent pivoting movement of the cam body out of a clamped position when the locking tab is in the locked position.