Patent ID: 8607687

Claim:
A bump-stock for a semi-automatic firearm, said bump-stock comprising: a handle adapted to be grasped by a user's hand, said handle including an opposing surface for directly interacting with a bearing element of the firearm so that said handle is able to be held firmly in use while the bearing element and firearm freely reciprocate back-and-forth along a constrained path, a finger rest, said finger rest configured to stabilize the end of a user's trigger finger in a partially extended condition so that in use the user's trigger finger stretches in front of the firearm trigger while the remaining fingers of the user's hand grasp said handle, said finger rest and said handle being fixed together as a unit while in use the bearing element and firearm freely reciprocate back-and-forth along said constrained path, said finger rest having generally planar side walls and a concave open end between said side walls establishing a cradle for the user's trigger finger while the remaining fingers of the user's rear hand grasp said handle.