JT GI Splatmaster .50 Cal Biodegradable Low Impact Non-Toxic Paintball Ammo -. GI Sports and JT Have teamed up to bring you the latest in .50 caliber paintballs. Low Impact, 100 percent biodegradable, non-toxic paintballs. Round and consistent. Thick, bright fill. Paintballs may vary in color. Each bag will contain the same color. Compatible with .50 caliber paintball guns. - DO NOT PURCHASE THESE FOR .68 CALIBER PAINTBALL GUNS