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I have a Tactical Alpha Black with a scope. But I was wondering what I can do to offset the hopper?

Because it gets in the way of the scope. I got this: http://www.academy.com/index.php?page=content&target=products/recreation/paintball/accessories&start=24&selectedSKU=0365-20761-5059

But I am not sure how to put it on. Can you please help?

Your best bet is to get a cyclone Feed system and then put on a Cyclone Hopper adapter. All this can be bought at Ultimate Paintball. http://www.pntball.com