SACair Forum

I hate Hop up units.

Systema hop unit. Even when I buy a Systema body I STILL buy the hop unit separately because I like the quality of the white plastic pieces over the stock Marui pieces. The hop gears mesh so much better than the Marui.

I would agree with Ray Ray.....Systema Hop units are very percise, I would also HIGHLY recommend Hurricane Hop Units. I have never had a problem with these hop units.

I had the same problem when I switched my CA hop unit for a TM one. The BB's wouldnt feed or they would fire every other one...this is with a Sytema gearbox if that matters any...I looked into the hop while dry firing and noticed that he nozzel was not retracting back enough into the rear of the hop unit to load another bb (the tappet plate was fine). I ended up switching back to the CA hop unit and it worked fine?

thanks, yeah hop units are frustrating, I've got 2 M4 style rifles, both TMs

As long as you don't remove the clear bucking once installed you should almost never have to replace it. They're a bit on the stiff side and tend to tear when the barrel is removed. Sometimes you get lucky though.

I am having trouble with my systema hop up, every so often it will shoot 2 bbs, can anyone think of what it might be?

Check that your bucking is not distorted or ripped. ALso check the alignment of the hop chamber to the gun body, and the gearbox to the body and the hop unit. Make sure your hop isn't missing that little spring. IF the gearbox screw that attaches teh rear stock is too tight or too loose, you will get double feeding or dry firing. I had this happen on a M4 once, and it took forever to figure out. Hope this helps,

Alright I will go through what you said and try to figure out what it is. Thanks

its your bucking

i run hurricane metal hop up unit and guarder clear with the first factory strick chamber. pretty much i set my hop up about 5000 rounds ago and its exactly the same as it was then. WORD