Browning Buckmark Reflex sight
Browning Reflex sight (red dot)
New model is not has on this picture, one screw on the side and fits picatinny rail only
*IMPORTANT: Some earlier versions of this sight had a Weaver-style rail attachment. Before purchasing, check the packaging to confirm that the sight you have fits the base on your firearm. The general rule is that "Weaver devices will fit on Picatinny rails, but Picatinny devices will not always fit on Weaver rails."