CA MP5 Metal Body + Hopup Airseal Issue
 

alright, so Ive been running a TM MP5 for the last year and its been performing beyond expectation. After Getting a CA B&T Mp5 Metal body for it, Ive noticed what appears to be an airseal issue. The Body required me to change the Stock TM MP5 hopup with a new Metal Hopup and since then, My rounds have been dropping within 20 meters on any hopup setting.

The gearbox is functioning perfectly, and the airseal issue is not comming from the box.

The Hopup assembly is flush against the gearbox and there is no play between the hopup assembly and the gearbox.

I suspect there may be a gap between diameter of the nozzel and the hopup assembly. But even if this was true, I cannot think of any solution that could try to solve this issue.

Any Suggestions?

Make sure you put the hop up spring in otherwise the gearbox will force the hop up away from it.

Hop up Spring? Im not talking about the plastic CA or TM Hop ups. Im talking about the CA B&T Metal body hop ups.

http://img75.imageshack.us/img75/9312/hopupse0.jpg

Theres no springs involved

its probably because the loading nozzle in your mechbox isn't fitting well with the metal hop up (could be fractions of milimeters) and therefore causing an airleak! just try some aftermarket nozzle to find the perfect fit or try to find a ca mp5 loading nozzle... had this happen with my last build, the nozzle was not sealing the hop up chamber tightly! and was causing the gun to fire 110 fps! lol

yea, mines running around 140fps >.> should be shooting 340.

I figured as much, but the way I see it. If the Inner Barrel, hopup and nozzel is the same. There should theoretically be no problems seing how the hop up assembly itself pushes into the hopup rubber.

ehh what i'm talking about is the loading nozzle on the tm mechbox it may be too small in diameter by a few fractions of mm to properly seal the chamber... to fix it simply buy aftermarkets nozzles, look on ehobby should not be too pricey

ok i just saw that... :rolleyes: as i said change the nozzle

I figured as much, I dont have a spare MP5 sized nozzle to test out the theory otherwise I would have done it before posting.

ahh ok ok, ask a local gundoc... they will surely have some...

edit do you have a vernier caliper... you could measure the id of your hop up then ask for measurement of other nozzles... measured one i have in my part box 6.95 - 6.97 mm

hope this help!

lol the tm mp5's hop ups are screwed into the receiver

I am a gundoc lol, I just dont have spare Mp5 nozzels, tons of M4,AK etc lol.

I have a digital vernier, ill take a look later tonite.

Yea, the TM's are, but the CA one isnt.
Thats why I checked if the Hop up was loose or if there was any play. But there Isnt.

If no......bug the local Jugglez man. Him are the man for the parts you seek. Great confusious say, Jugglez has more parts than I proverbs.

LOL....PM Juggles for any of your needs there bro.

SHA DO

Already looked but he doesnt have the particular nozzel i had in mind. Im bringing in an order soon anyways so I might just add it to my order. But yea, I do hit up juggles whenever i need specific individual parts.