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Bet with a cleanup and new rubber it would still bring home a feed.

I've mucked around with a few old guns - find the plastic explodes with age and sun baking I guess....
I did a bit of a restore...

Get a Rob Allen spear - Spears Rob Allen 6.6mm
You'll just want to confirm that you have a Euro mech gun - some of the older guns on TM are US mech and need a different notch in them, harder to get...

https://www.youtube.com/watch?v=sJ93-fImQYo

Yeah Wettie kit is pretty bulletproof.
I've a Wettie handle and mech on a Omer barrel - run thicker rubbers and love the Rob Allen shafts.
People rave on about the gun and size, and sure decent kit...