We supply the FX Wildcat MKIII / Maverick pellet probe for the following calibres:

4.5mm (.177)
5.5mm (.22)
6.35mm (.25)
7.62mm (.30)

Specifications:
Brand FX Airguns
Product code 20319 – 4.5 mm
20320 – 5.5 mm
20321 – 6.35 mm
20322 – 7.62 mm
Calibre 4.5 mm / .177, 5.5 mm / .22, 6.35 mm / .25, 7.62 mm / .30