hop up rubbers can't really "wear" out. What you are noticing is the BBs leaving residue onto the hop up rubber after each shot. So eventually it's going to build up and work against your hop up performance.
to fix it, you just need to wash the hop up rubber in hot water and kitchen detergent. It usually increases your accuracy and consistency as well.
So far the BEST hop up rubber i've ever used was hands down Systema, great friction and great compatibility. Next is prometheus, also great friction and airseal. Guarder clear hop up rubber is simply over-hyped it's very easily torn and swells over time. However it does have good friction on it.
Don't want to hurt any feelings here but it's what I observed from 4 guarder clear hop up rubbers I ve owned in the past.
I can get my 400FPS gun shot out to 180~200 feet(Measured) with 0.25g Metal Tech BBs(Very Accurately), even farther with 0.28g BBs. This is using washed systema hop up rubber.
My 2 cents
Last edited by Skladfin; June 16th, 2009 at 21:09..
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