Quote:
Originally Posted by MultipleParadox
I bought a set of Madbull's rubbers (the Sharks) and it was so tight on my Prommy inner barrel that when I tried putting it in the hopup unit it was deforming the bucking quite a lot. So I would say it add some truth to this "rumor"
FWIW, Madbull do state that the Shark bucking doesn't fits all barrels
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Here's my experience with Madbull rubbers (the blues), I installed them in all my guns at one point and had a terrible time each time. They either didn't hop enough (would drop off early) or would hop too much (noticeable upward spin). I don't know if it is normal to need them to break in or something, but I felt it could have been better out of the box. I also had fitting issues with some of my setups (rubber had a tough time fitting into the whole assembly). I wouldn't recommend them to anyone after this.
I switched out to Lonex hop ups and the difference was quite noticeable. It took a few adjustments and the hop up was perfect (3 - 5 shots)