A free-standing post supported target mechanism has a support post of a defined cross-sectional geometry. A baseplate defines a post opening receiving the support post and has a first orientation permitting movement of the baseplate along the length of the support post and a second orientation establishing a gripping relation with the support post. A spall plate defines a post opening receiving the support post and has a first orientation permitting movement of the spall plate along the length of the support post and a second orientation establishing a gripping relation of the spall plate with the support post. A target plate engages the baseplate and the spall plate and is secured by a locking member. A target base defines a receptacle receiving and supporting the support post and establishes a weight-forward condition that offsets the rearward forces of bullet impact.