I am probably in the market for a worthwhile 335 but cannot quite clinch the difference between the various models.

I discovered this quote via the internet: "I did buy another 335 from this sites owner later in the 80's by which time they were calling it the 335 'magnum' apparently it had a slightly larger diameter air chamber with the word 'magnum' inscribed within a triangle on the chamber between the end of the scope rails and barrel,the upgrade was a response to the english rifles being upgraded at the time as in the vulcan and merc 's' iirc which were seeing an increase in popularity at the to time."

Thus, contrary to what I and others have previously deduced, it seems there was indeed an upgrade of sorts in the form of the 'Magnum' and this description was not, after all, to differentiate from the lower power models (sub 6ft/lb) in Germany.

It also seems the rear sight altered between the Mk1 and Mk2, with the former fitted with the sliding sight (akin to the FWB). Per the photos posted earlier here, the Mk2 seems to have the traditional circular screw for elevation. Or could that have been a one-off? Perhaps, if a standard fitting, the modified sight on the Mk2 was a cheaper sight to fit at the plant.

Other than the barrel release, was the Mk2 a more powerful version, perhaps also designed to address the occasional splitting of the front stock mounts, caused by recoil, to which some have referred elsewhere?

Can anyone shed any more light on these points as I am possibly in the market for one of these?

Rgds
A