The other way you could make a mould from it and cast in a stronger machinable plastic. You would have to do some research into the type of casting plastic that would be durable but it can be feasible. Theres some really tough resin plastics out there in the casting world. As for pumping the wrong way i wonder how many owners know the correct way.
Only the original owners know how to pump a sharp as they came with the destruction manual that nobody reads anyway. I have to admit that i snapped the stock on one in my early days through pumping it wrong, Its ok for a few pumps then can become dangerous as the pressure in each stroke increases. The rifle only has one way to go when it breaks and thats usually upwards into your face, Most only have the one screw holding the stock on so its the weak point if holding the grip when pumping it up. Col.
That's why I bought an ace. Steel breech much better. Shame they did not do a steel or alloy breech for the Innova as I love the shortness of the gun.
I will follow Colin's advice to finish the break.
Just spoke to a plastic repair company here in Amsterdam.
I will go there on Tuesday to decide what is the best way to (try to) repair the breech.
Perhaps plastic welding will be possible.
I still think the Innova was Sharp's best design.
I have 8, and this is the only one with a (big, lol) problem.
All from the eighties, all working perfect. So light and compact, big smiles every time.
The manual is indeed clear that one must hold the breech whilst pumping!