Is this a mk1 BSA airsporter?

Yes looks like a mk1, the later ones had a screw in reciever,your looks like it all in one, think they changed in the mid 60's.
They came with a leather piston washer, probably not the most effective seal, don't know if you could upgrade to ptfe or not, might require a piston assembly change.
It's not mine Griff. I was only given the task of fixing the trigger. It will probably end up for sale in the shop. The shop keeper looks after me 😊.
I've seen seals on line.
 
Photo please Phil 👍
hi David I'll take a pic in the morning.
all you do is run a piece of cotton from the front sight to the rear to get a straight line to mark for the holes.then drill and tap the holes using the pre drilled holes on the rail.make sure the holes are not in the compression part of the stroke.then you can either put a scree in making sure it does not foul the spring or a stud with a nut and washer to hold the rail.
it sounds complicated but it really is easy.
also for extra ridgety a layer of epoxy under the rail.
 
hi David I'll take a pic in the morning.
all you do is run a piece of cotton from the front sight to the rear to get a straight line to mark for the holes.then drill and tap the holes using the pre drilled holes on the rail.make sure the holes are not in the compression part of the stroke.then you can either put a scree in making sure it does not foul the spring or a stud with a nut and washer to hold the rail.
it sounds complicated but it really is easy.
also for extra ridgety a layer of epoxy under the rail.
Sounds like a tactical airsporter lol.
Heck, with the auto tap it's dam near full auto! 😁
 
I had a BSA Airsporter but mine was an under lever cocking mechanism with a fixed barrel and swivel pellet loader, I should have kept it!!
 
but mine was an under lever cocking mechanism with a fixed barrel and swivel pellet loader,
As was mine, i bought it new in 1967 and there wasn't an introduced bird that was safe in the neighbourhood or cat from an introduction.
 
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