This universal piercing screw replaces the piercing screw-on T4E HDP50, HDX 68, HDS 68, and TR50 paintball markers. Just screw in the new screw and pop the bottom for instant engagement of a fresh CO2 cartridge. This is a good item to keep as a spare to prevent downtime in case of a seal failure. Use a small amount of silicone oil (not petroleum oil) on the o-ring seal to ensure a longer seal life.
