Jammed Aftermath Broxa MP5

[Cocoa Puffs]

Hi guys, I'm just starting off airsoft, so I bought an Aftermath Broxa MP5, I was firing the gun for a while in my backyard, just to see how well it worked. I was firing off rounds and eventually I ran out, so I just dry fired for fun. Then my gun stopped firing. When I pulled the trigger it made a clicking sound. I fired it like 3 times to see if it could unjam itself, but after that failed I stopped because as far as I know, If I keep shooting its gunna get worse. Im using a 1200mAh 8.4V battery, pretty much fully charged, I took off the stock and checked the wire routing, and it seemed to be pretty normal. I did take off the cap with the moter inside once and reassembled it, but it was still working at the time. I dont know what to do. Help please :banghead:

[m102404]

Recharge your battery completely....put the MP5 into full auto. Point in a safe direction (just in case).

Hold down the trigger.

If you get nothing (and there isn't a clunk/click in the trigger pull)...you'll need to start taking a look as disassembly and wiring. First thing to check is the fuse, after that and it's more involved and if you're not willing to do all the research and dive in, then find someone to work on it for you.

If you have no shot but a click in the trigger pull, you're into disassembling it. Could be number of things, but you won't know until it's splayed out to see.

Youtube and Mechbox.com have some great tutorials...your MP5 comes apart just like a TM Mp5

[Cocoa Puffs]

I checked the Fuse, and it hasnt been blown yet, How long should I stick the battery in to make sure it is fully charged? I can do a disassembly If I need to.

[Cliffradical]

I work on these a lot. Some of them seem to run forever if they're cared for, others seem to die fast and hard. Unfortunately, it's probably the dry-fire that killed it, and possibly having a lot of sustained fire through it depending on how many rounds you shot.

A locked gearbox in one of these can be a few different things.

#1 is probably the motor itself. They can burn out pretty easily vs. other AEG motors.
Remove the motor, and reconnect it. Test your trigger to see that the motor is getting power and cycling. If it's spinning freely and doesn't sound like it's low pitched, under-powered, or otherwise struggling, it's probably okay. Make sure that you hold the motor securely while you do this, or it will flop around violently and cause more problems. Make especially sure that you do not touch any of the contacts or otherwise cause it to arc, or you'll get a nice electrical burn.
If it works fine, you can re-seat the motor, make sure the wiring is run properly, and back the motor height adjustment screw way out. Then you need to gently and carefully dial the motor back in until it makes contact with the bevel gear again, and see if it will move. If it's still locked, move on to the gearbox.

#2, The gearbox.
First off, if you've never worked on one before, do some homework. Find out everything about V2s that you can.
Once you've done that, be extra super careful when you disassemble the body. The plastic bodies on these guns are very, very brittle. You can break/ fracture/ strip the screw taps on these bodies even while being careful. You need to be downright anal about these things.

The main causes for locking failure in these things that I've seen are (in no particular order):
1. Spring bound up on the guide rod/ broken
2. Broken tappet plate
3. One or more stripped gears launching rogue teeth into other gears and causing a lock
4. Motor which seems fine on inspection failing to turn over the gearbox due to shittiness
5. All of the above

Now here's where it unfortunately may get sad and disappointing.
If you have any problems with this gun which require you to replace parts and/ or pay for a gun-tech's time, the work will rapidly become worth more than the gun is new.

I wish you luck, and this can be a great learning opportunity for you, but you're realistically better off buying a new one.

[Cocoa Puffs]

How could firing an AEG without bb's break it? The motor sounded fine to me. I overpaid $180 for this gun and 2 extra magazines, I couldnt imagine how it could fail in the first 2 days, although I did buy it used. The sound is more like the motor moving to push the piston, and then failing to do so, like something is preventing it from moving. Could a low charge on the battery make it appear this way? like theres not enough power left to push the piston against the spring? I really hope I dont have to buy a new gun, ill be back on pistols for a while if I do.

[Cocoa Puffs]

I'm going to try to charge the battery first, I'm using a 1200 mAh 8.4V battery, and this really crappy 8.4V 250mAh charger that came with the gun. I assume if I get a 9.4V battery the rate of fire should increase right? or would that just prematurely fry my motor? my 8.4V should be done in 5 hours 46 minutes

Edit: im disassembling my gun right now to check the gearbox for damage, I got the stock off, the motor and lower receiver and grip off, all the rails and the rear sight. but I cant figure out how to get the front hand guard off and the charging tube. and Mechbox is under reconstruction right now, there site is being redone

Edit2: i got the hand rail off, it had some glue stuck in there, but now I cant figure out how to remove the charging tube assembly

[Cocoa Puffs]

WOW... A fully charged battery and its back. I guess thats what I get for using the cheapo battery that came with the gun :P Im probably going to be in the market for a 1600mAh battery. but now I have another question. Would using a 9.6V battery put too much strain on the V2 gearbox? Iv read up on other guns that use the same gearbox but running 9.6V But some people told me that running the 9.6V could kill the gears due to too much pressure.

[Grudge]

I run a 9.6V 3800mAh Battery in my Broxa! No issues been going strong for 4 years!