Quote Originally Posted by joffy View Post
So it'll be a mk1 or 2 the bigger marks are the airsporters hence the confusion . Roughly the same guns . Its usually the .22 guns that are a bit erratic due to their British bores
No, it’s a BSA Mercury Mark IV. No ‘confusion’.

https://twchambers.co.uk/airgun-spar...all-marks/mk4/