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MP7 Hopup Issues


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#1 emobaggage

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Posted 13 January 2011 - 06:40 PM

My hopup seems to be rather inconsistent. It usually puts the normal amount of spin on the bb, but every 10 rounds or so, one bb will fly down at about a 30 degree angle. My bb's are also flying to the right on occasion. Lastly, my bb's keep jamming in the hopup unit, especially during the 2nd fill of bb's on one fill of gas. I'm using high-quality .25's, tried turning the hopup all the way off, cleaned the barrel, lubed the hopup unit and deburred the feeding thing on the top of the mag to try and fix it but it still jams every 15-20 rounds or so. Does anyone know how to fix this?

#2 gcw360

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Posted 13 January 2011 - 06:52 PM

What kind of gas are you using?  Propane or green gas? :gun:

#3 Spiggy

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Posted 13 January 2011 - 09:28 PM

what brand of bbs?

just because it has "high quality" or "high precision" or "high polish magic quality awesome" stamped on it doesn't necessarily make them good.

#4 emobaggage

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Posted 13 January 2011 - 09:35 PM

View Postgcw360, on 13 January 2011 - 06:52 PM, said:

What kind of gas are you using?  Propane or green gas? :gun:
Propane, but does that really matter?  <_<

View PostSpiggy, on 13 January 2011 - 09:28 PM, said:

what brand of bbs?

just because it has "high quality" or "high precision" or "high polish magic quality awesome" stamped on it doesn't necessarily make them good.

They're Goldenballs, I've never had a jam throughout some 60k rounds in any of my other guns. I tried some Javelins too, didn't help.

#5 gcw360

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Posted 14 January 2011 - 06:55 AM

I'm wondering if your hop-up rubber has absorbed too much silicone.  There are various threads on this subject.



#6 emobaggage

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Posted 14 January 2011 - 11:31 AM

View Postgcw360, on 14 January 2011 - 06:55 AM, said:

I'm wondering if your hop-up rubber has absorbed too much silicone.  There are various threads on this subject.

Is the only way to fix this to change out the rubber?

#7 Vamp2269

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Posted 14 January 2011 - 01:39 PM

:rolf2: lol he said rubber

You can either buy a new bucking or soak the old one in a solution of water and greese fighting dish soap.

#8 Spiggy

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Posted 14 January 2011 - 02:41 PM

View Postemobaggage, on 14 January 2011 - 11:31 AM, said:

Is the only way to fix this to change out the rubber?
best method is to start anew.  It eliminates a major variable if there are any other problems.

Dish soap trick works best with the AEG hopups.

#9 Vamp2269

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Posted 16 January 2011 - 12:04 PM

Yea the best fix is to replace the bucking altogether. I bought a new bucking and washed the old one so I can use it as a spare.




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