Lapco Paintball Billet Precision Ball Gauge Red Internal Marker Upgrades Velcro fastening side pockets with Molle Attachments Velcro fastening side pockets with rubber A Tab detail USB Updates Standard USB connection to the RSX circuit board makes updating the state of the art circuit board with the latest updates as easy as downloading pictures from a smart phone Grab one of these handy gauges to determine the diameter of your paint to pick the perfect insert or bore size or to size your paint in the store to make sure you're buying paint that will fit your barrel perfectly For players looking for the utmost accuracy