The Martin Black Mamba showcases the beautiful features of the original Mamba, highlighting the ultimate combination of black wood and glass. Short, quick, maneuverable and lightweight the 58â?쳌 length stores a great amount of energy quickly and is especially suited for an archer with a 28â?쳌 draw length. AMO length: 58â?쳌, Brace Height: 6.5â?쳌-7.5â?쳌, Weight: 1 lb. 14 oz.