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Reccomend a hop rubber

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  • 05-08-2009 2:40am
    #1
    kinkstr
    Closed Accounts Posts: 2,542 ✭✭✭


    I recently bought this tightbore and at the moment its chroning at 260-270 with systema hop up rubber. The stock hopup that came with the m4 comes in at about 250.
    Can anyone tell me if theres one more suited to use with this barrel to get the fps up to 300 ish.


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    #2
    Stercus Accidit
    Registered Users Posts: 8,758 ✭✭✭Stercus Accidit


    I like the madbull blue hops, others recommend guarder hops.

    What's wrong with the systema anyway?


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    #3
    kinkstr
    Closed Accounts Posts: 2,542 ✭✭✭kinkstr


    Nothing apart from the low readings, i forgot to add that when the hop is fully on im getting readings of 190 ish so i said i might aswell try a new rubber and a new nub to see if it makes any difference.


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    #4
    Stercus Accidit
    Registered Users Posts: 8,758 ✭✭✭Stercus Accidit


    Could be an airseal thing, you would want to make sure its seated well back in the hop unit, and isn't pushed forward away from the air nozzle.


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    #5
    kinkstr
    Closed Accounts Posts: 2,542 ✭✭✭kinkstr


    Cheers, im starting to think theres an air seal problem now as its just chronoed at 285, back to the drawing board.


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    #6
    Leftyflip
    Registered Users Posts: 7,463 ✭✭✭Leftyflip


    Teflon Tape Mod.

    Wrap Teflon (PTFE) Tape around the hop rubber.
    hoprubberteflontape.jpg

    Then, wrap Teflon Tape around then end of your hop-up chamber and barrel.
    hopupbarrelteflontape.jpg


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    #7
    MiniAirsofter
    Closed Accounts Posts: 190 ✭✭MiniAirsofter


    ^^
    What he said. Also make sure the air nozzle is seated well in the hop up chamber and that it is forming a seal with the rubber. Also the best rubber I have used is a Guarder Silicone.


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    #8
    kinkstr
    Closed Accounts Posts: 2,542 ✭✭✭kinkstr


    Just tried some teflon tape, thats saved me wastin 4 bucks on a new guarder hop up:)
    Ive got it firing consistently at 295-305 so im happy, thanks for the advice lads.


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