Abstract: The preferred embodiments of the present invention provide an apparatus structured and arranged to securely clamp an object to a support structure. The most preferred embodiments of the present invention comprise a clamping apparatus configured to secure a long rifle or other firearm to a tripod, using a standard camera mounting bracket. In this embodiment, the clamping apparatus comprises a base with a pair of substantially L-shaped interlocking brackets and a pair of spring-loaded cam locking mechanisms used to fix the L-shaped brackets in position. Additional preferred embodiments of the present invention comprise rubber pads or other protective material affixed to the surface of the clamping apparatus to minimize damage to the object being clamped. A method of using the clamping apparatus is also disclosed.