Abstract: Locking apparatus for wooden cabinets for long guns such as rifles and shot guns comprises a lower stationary metal band horizontally mountable in the cabinet at about trigger height, and an upper metal band horizontally mountable in the cabinet above the lower band at about barrel height. The upper band comprises a back bar fixedly mountable to the back of the cabinet, side bars fixedly mountable to the sides of the cabinet, and a removable front locking bar which is releasably securable to the side bars. The locking bar is engaged to one of the side bars by means of a tang in one end of the locking bar which mates with an aperture in the one side bar, and is locked to the other side bar by a pin-tumber type lock in a housing coupled to the other side wall having a cam which mates with an aperture in the other end of the locking bar.