Gun barely firing in semi and full help please

[mirinjawbro]

Hello all

I have a G&G MP5 SD5 Top Tech.

the gun has fired around 3-4k rounds. if that.

the last week or so the gun would not fire in semi, after pulling the trigger it would not fire but make a gearbox turn as if it got half way there, switching to full auto it works sometimes, maybe fires 3 -4 shots then the same problem, then I can switch to semi pull the trigger and it might fire one round then the same problem. it feels very clunky now in the handguard and just not how it did when new.

any ideas?

thanks

 

[EDcase]

Without seeing/hearing the problem its impossible to tell.

Could be as minor as broken wire/solder or as bad stripped gears...

You'll have to open'er up to have a look in the gearbox or send to a shop/tech.

 

[mirinjawbro]

Attached video. See it just stops in full auto. This is alit worse on semi most of the time and just doesn't fire. 

Gun is literally brand new.

View attachment 46656

 

[EDcase]

If its new why not return it?

Single fire sounds OK to me

Gearbox sounds OK so I would guess it stops firing on full auto because of a bad connection somewhere.

 

[mirinjawbro]

That video was a very good example. It's never usually that good. After some.more fiddling it seems it's better at certain angles. Eg laying down. 

I mean new as in use wise. I've had the gun about 8 months sadly. 

Thanks all

 

[EDcase]

Most likely a loose wire.

Open the bottom of the hand grip (2 small screws not big one)

Check wires to motor in there...

 

[Rogerborg]

The word I'm not seeing here is "battery", and that's what I'd check first.  If you're using a nimh, I'd upgrade to lipo.  If you're using lipo, I'd get a B6 charger which actually tells you what voltage it's charging up to.

 

[EDcase]

The battery didn't sound weak to me but it may be a culprit.

 

[mirinjawbro]

The battery is fully charged. The gun firing in the video has not worked that we'll since it started. You pull the trigger and you get a gearbox whine but no firing. It's as if it completes 3/4 of a cycle. 

 

[Nick G]

Could still be a battery issue. For instance I've had lipos for my helicopters  that were freshly charged, showing full voltage, but as soon as I spin the rotors up and apply some lift they die and everything cuts out. Ok aegs don't have the same fail safe systems as helis do so the motor may keep trying to run but basically  when put under load the battery just fades. Try a different battery, also what spring is in there ? a high power spring will put more strain on the battery. 

 

[mirinjawbro]

I'll have to check when I get home annoyingly. It's all stock at the moment . Thanks 

 

[Asomodai]

I am guessing motor height/connector on motor. All adjustable through removing the pistol grip bottom cover. 

 

[mirinjawbro]

Thanks everyone for your help. Will check battery and the motor. Anything I should look for? In a gbb man mainly. Thanks 

 

[EDcase]

Just make sure the connectors are on and tight.

 

[Albiscuit]

That video was a very good example. It's never usually that good. After some.more fiddling it seems it's better at certain angles. Eg laying down. 

I mean new as in use wise. I've had the gun about 8 months sadly. 

Thanks all

8 months?

i would take it back to the shop.. I would certainly it expect an item like a RIF to last longer than that! I would ask for a warranty repair at least!

 

[ImTriggerHappy]

8 months?

i would take it back to the shop.. I would certainly it expect an item like a RIF to last longer than that! I would ask for a warranty repair at least!

^^^^THIS^^^^ is the correct way to repair it.

 

[Rogerborg]

The battery is fully charged

Since you didn't say what voltage your charger is telling you that it's charging it up to, I'd question how you know that to be the case.

Motor height is a good shout though, and easy enough to fiddle with.

 

[mirinjawbro]

after removing the 2 bottom allen keys and retightening them back up it all seems to be working again. 

will check tomorrow properly

thanks all

 

[mirinjawbro]

after playing this morning, undoing the screws, I have no idea what im looking for and actually not really enjoying AEGs so I think im gonna stick to GBB.

gun is now for sale. grab a bargain and probably a very easy fix for an almost brand new gun. please msg if interested

thanks