Air Arms striker / hammer for the following air rifles:

Standard power (shown on top) suitable for – MPR FT, S300, S310, S400, S410, S410 TDR

High power (FAC) – looks same as standard power but heavier – suitable for – MPR FT, S300, S310, S400, S410, S410 TDR

FAC Xtra models power (shown on bottom) suitable for export models of –  S410, S500 HP,  S510 HP, S510 TC HP