The Tippmann Front Sight Spring. Fits most Tippmann made markers. Spare parts are always good to have.
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, 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, Model 98, Project Salvo.
The Tippmann Part Number for this product is 98-44.