Quote:
Originally Posted by BKHKMP5
I installed a Gaurder SP120 upgrade kit into my MP5. It's pretty much the first time I've had it running properly after putting the whole thing up together. Here's the problem. There seems to be some sort of plastic thingy inside the hopup tube. Is this normal. It's right after where the bb's are fed into the barrel from the magazine. If I poke it this flap moves out of the way, it seems really loose. If I try to fire, the bb just gets stuck and doesn't pass the flap. I used a screw driver and poked around till the flap went away. My gun then fired just fine. After about 30 shots, that stupid flap came back down and jammed the bb's again. Any idea what's going on? Is this flap supposed to be there or is there something broken inside my hopup. I'd rather just remove the flap if possible. Thanks,
Bryan
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that would be your hop-up bucking you are stabbing at with a screwdriver,,and it is adjust to the all the way on position,,thats what you are seeing. the "hop-up" is what puts backspin to the bb as it is fired from the barrel,,,kinda the same way you would shoot a basketball,,,with backspin as it leaves your hands,,,same idea. this gives your bb the truest flight possible. now,,just above the foregrip close to the outer barrel you will see a small 2-3 mm lever,,that would be your hop-up adjustment. back it all the way off and adjust it according to how the bb flies. the straightest and truest flight is what you want to achieve. keep in mind it is still a bb gun and anything can hinder the bb's flight time.
(p.s.) here's a pic of the hop-up lever.
http://i41.photobucket.com/albums/e2...hopuplever.jpg
(p.s.s.) and for poking at your hop-up bucking with a screwdriver,,you are not called "bryan" anymore,,you have earned the nickname "BARNYARD" ( joking)