Product Details JT Paintball ER4 Ready 2 Play Kit 78962581974 Get in the game with the JT ER4 Semi-Auto RTP Kit. The JT ER4 RTP Kit comes complete with semi-auto paintball Markers, three 12 gram CO2 cylinders, 40ct loader, barrel plug, paintballs and Guardian II Goggle. Features .68 caliber semi automatic marker Lightweight composite construction Low profile vertical feed port Push button safety Specs Kit comes complete with semi-auto paintball Markers, three 12 gram CO2 cylinders 40ct loader, barrel plug, paintballs and Guardian II Goggle. California Residents WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov