other products by Weihrauch
Does this barrel fit the HW80 and R1 guns?
No, only the HW95/R9. The breech block for the HW80/R1 barrel is different. You will find what you need at Chambers in the UK.
Does this have groves for a sight?
Is this barrel interchangeable with HW95 in .177?
Yes. It is the only difference between the two guns. Just be sure you want .22 because the velocity will be 200+fps lower. It likely won't make any more power and on avg it'll be less accurate. You'll also need to buy the linkage pin which is a press fit. It's easier to buy the pin and linkage than try to get your old linkage off, plus by having both barrels with linkage you can swap back and forth.