Thanks for the Info guys.
thanks Eckart i will drop you a Pm
rusted tank, i stripped and rebuilt the entire gun using marine grease where necessary, its in pretty good nic for an old gun.
the spear head is rusted vas to the shaft but the spear is still straight.
the only thing that needs replacing or rather adjustment is the muzzle, the person who had the gun before but it on squiff, the sights don't line up so my accuarcy maybe compramised
as for a replacement spear i have access to a milling machine and lathe, so i can machine the spear to fit the trigger.