Hi Dizz
The Airsporters are quite collectable now but the early ones (Mk1/2) and the specials (Stutzen, Centenary, Club RB etc) are the ones that everyonme wants!
It sounds like something has come adrift in your rifle, Maybe the spring broke and a bit has got jammed maybe..
If you find the serial number on your rifle make a note of the letters (Numbers don't matter) Then have a look
HERE You can find out which model it is..
Then look
HERE and find your model, Click on it and you'll find an exploded view to check your internals against although it may be glaingly obvious when the gun is apart as to what the problem is :eagerness:
John :smug: