The majority of all paintball guns have upgrades that will boost performance in the following main areas! Speed, weight, efficiency and accuracy! Upgrades come in all shapes and forms as either in attachments or internal upgrades that you must install into your gun! See the difference after you install an upgrade in your gun as you will think you got a whole new gun entirely! Pick up the upgrade according to the type or by specific marker type! Tippmann Gun Upgrades, Empire BT Upgrades, Spyder Gun Upgrades, Empire Gun Upgrades, MacDev Upgrades, Dangerous Power Gun Upgrades, Dye Gun Upgades, GOG Gun Upgrades, Planet Eclipse Gun Upgrades & Proto Gun Upgrades