Quick-detach accessory base mount for an accessory rail

A quick-detach accessory base mount having:

• a cam that supports a rail clamp to grip an accessory rail when a mounting arm coupled with a pivot shaft is in a first position and to release the rail clamp when the mounting arm is in a second position;
• a preload screw threaded onto the pivot shaft at the end of the pivot shaft opposite the mounting arm and the rail clamp;
• and
• an interlock configured to selectively restrict rotation of the mounting arm between the first position and the second position, the interlock comprising a depressible interlock button depressible to a position allowing rotation of the mounting arm between the first position and the second position and springily biased to extend outward from a body carrying the interlock to a position blocking rotation of the mounting arm between the first position and the second position and an interlock set screw coupled to the depressible interlock button, the interlock set screw rotatable to adjust the outward extension of the depressible interlock button from the body.

A method for attaching an accessory to an accessory rail, comprising:

• generating a clamping preload with respect to the accessory rail using a preload screw threaded onto a pivot shaft coupled to a mounting arm, the preload screw at the end of the pivot shaft opposite the mounting arm and a rail clamp;
• gripping the accessory rail with the rail clamp supported by a cam in response to rotation of the mounting arm to a first position;
• selectively restricting rotation of the mounting arm between the first position and a second position with an interlock, the interlock comprising a depressible interlock button depressible to a position allowing rotation of the mounting arm between the first position and the second position and springily biased to extend outward from a body carrying the interlock to a position blocking rotation of the mounting arm between the first position and the second position and an interlock set screw coupled to the depressible interlock button, the interlock set screw rotatable to adjust the outward extension of the depressible interlock button from the body;
• and
• releasing the rail clamp in response to rotation of the mounting arm to the second position.