You need a gunsmith.
Your Browning B-80 in the description you described is valued at 450 dollars.
a 1978 yz80 (aircooled) piston "should" work, said a guy from Weisco. to expensive to try if it doesnt work.
Try Browning or egunparts
i want to know the value of a browning b-80 shotgun serial#421pv51646 please someone give me a price.
Seal
No serial number = no way to answer.
You can buy the rebuild kit on ebay ...just remove the head and the piston will still be on rod..remove clip and rod pin...and piston and rings will be in your hands
100-700 usd
not a clue
80 to 130kgs
Made between 1973-80
100-700 usd