Air Arms firing valve body for the S500 and S510 & Ulimate Sporter air rifles.
Includes internal valve seat face – if you have replaced the valve stem and are still getting small leaks down the barrel this part is often the cause.
Please see below to work out which version you require:
s500 & s500 XS FAC/Export – Part s507E-SL
s510 STD / UK spec (sub 12ftlb) – Part s507-SL
s510 XS / FAC Export –  Part s507E-SL
s510 TDR UK spec (sub 12ftlb) – Part KS507BM
s510 TDR R (Regulated) UK spec (sub 12ftlb) – Part S507-R
s510 TDR XS / FAC Export – Part S507-R
s510 Tactical – Part S507-R
s510 Ultimate Sporter UK spec (sub 12ftlb) Non Regulated – Part s507-SL
s510 Ultimate Sporter R UK spec (sub 12ftlb) Regulated – Part s507-R
s510 Ultimate Sporter FAC / Export – Part s507E-SL
s510 Ultimate Sporter XS FAC / Export – Part S507-R
s510TC UK spec (sub 12ftlb) – Part s507-SL
s510TC FAC / Export – Part s507E-SL