The invention is a throw lever assembly used to affix an accessory to a firearm. The throw lever assembly utilizes a base unit having a cam bed in which rests the cam. An anchor clamp secured to one end of an engagement rod with the other end affixed to the cam. The cam has an arm extending from it which is used connected to a handle portion. The handle portion is selectively locked/unlocked to the cam via an upper surface the arm. When locked to the arm, the handle portion is able to move the cam causing the assembly to be either locked or unlocked from the firearm.