Replacement valve adjuster screw for the FX Impact air rifle.
Available in 3 versions:
– 19668 UK Spec (19749) (sub 12ftlb/16joules) – shown as the top image. – Fitted to MK1 and MK2 and MK3 non power plenum models
– 19668 Standard Spec / FAC – shown as bottom image. – Fitted to MK1 and MK2 (but NOT Power Plenum models)
– 20277 Power Plenum Version – looks the same as bottom image – Only fitted to the MK2 and M3 Power Plenum versions

Please note: Adjustment of this part may take the rifle over legal power limits for your country. Please observe local laws and regulations.