It is a fairly simple spring-piston design, some say coped from the FEG pistol which may well be its ugly grandmother.
Here is the exploded diagram from Chambers
https://www.gunspares.co.uk/products...Falcon-Pistol/
I would do a standard 'oldschool' springer tune on it to smooth it out and reduce spring surge. Its more common stablemate the Centre, which shares its metal bits, was a very common pistol trainer in the 70s and 80s for people beginnning in the sport.
oldschool tune thread... you just need the first post...
http://www.airgunbbs.com/showthread....ing-Gun-Tuning
Once you have given it a tune it will be just a matter of a drop of oil on the linkages every tin of pellets or so, and that is it til the spring needs changing.
Ugly grandma pistol, the Relum Hurricane (made by FEG in Communist Hungary)
https://www.google.co.uk/url?sa=i&rc...89178168195560