The Tippmann Red O-ring for the Safety. Just in case that little thing disappears.

This product is used in the following guns: 98 Custom Non-ACT, 98 Custom ACT, 98 Custom Response ACT, 98 Custom E-Grip Electronic ACT, 98 Custom Pro ACT, 98 Custom Pro Response ACT, 98 Custom Pro E-Grip Electronic ACT, A5 Basic, A5 Response, A5 E-Grip Electronic, A5 Stealth, Alpha Black Basic, Alpha Black Tactical, Alpha Black E-Grip Electronic, Alpha Black Tactical E-Grip Electronic, Bravo One Basic, 98 Ultra Basic Non-ACT Platinum Series, 98 Custom ACT Platinum Series, 98 Custom Pro ACT Platinum Series, Pro Carbine, C-3, Model 98, Triumph eXT, Triumph XT, Triumph XL, Gryphon, Carver One, Project Salvo, TPX.

The Tippmann Part Number for this product is 98-55.