V2 Gearbox Extra Piece
 

This is the second time I have taken my V2 gearbox apart from my Broxa. This time as I was putting it all together a black rod fell out about 1/2 an inch long and 1/16 of an inch in diameter. I have looked over multiple V2 gearbox diagrams and over the gearbox itself and can't seem to find where this rod goes... if it goes anywhere.

Any ideas?

take a pic, maybe you're talking about a spring guide?

Is it your safety? Look by your trigger and there should be a little piece that can pivot on a screw and stop the trigger from being pulled in safe. With a pic someone will be able to tell you for sure.

it's the gearbox retainer pin. it goes through the lower reciver and gearbox.

In an MP5?

...

Post from the selector switch? It goes through the gearbox on an MP5.

That's pretty firmly affixed to the right side selector switch though.

Oh boy.

MP5 for the selector is attached to one lever. No gun type was mentioned anyways, and I am leaning towards the lower receiver retaining pin for an Armalite............ but it's not 1/2" long. There isn't a gearbox that I know of that has a 1/2" x 1/16th inch black pin inside of it. Just toss it on your spare parts bin.

He said Broxa, which means MP5.

Are you sure that it's from the mechbox? I suspect it's a post from your MP5 body....although it'd be clear plastic (unless you spray painted it).

A pic would be extremely helpful on this one.

Tys

Here's a picture

http://img.photobucket.com/albums/v6...P/untitled.jpg

It is metal... it is possible it's a reinforcement for the safety, it does fit in there nicely.

F*ck me...that shouldn't be in a V2, nor a V3 mechbox...

I'm mentally going over an MP5...can't pick it out.

I do suggest you take a look at each of the posts that join the two plastic halves of the upper receiver together...there's several posts that mate up with holes/posts. I think (I really can't remember and I'm not going to the workbench to disassemble an MP5 to check) that some posts have rods like that. It might have pull off a post when you took the MP5 apart.

Tys

Do mp5's have mech box centering pin's? could it be that if they do?

huh, isn't that the gearbox retaining pin? it shouldn't be inside the gearbox, just leave it out

TM style MP5's don't. The mechbox is "held" in place to the lower grip with the grip screws (usually 2) and the selector lever. In the upper the hopup unit fits/indexes the front end and the mechbox just sort of sits between the two receiver halves. The grip is held to the upper receiver by the front and rear cross/through pins.

CA style MP5 mechboxes are held much the same...but the lower slides into the upper. Which is nice because you don't need to take so much apart to get to the hopup unit.

At least...that's how I remember it...and it's late...me tired.

That's correct. But beats me what that pin is. Looks like an armalite mechbox/lower receiver pin.

its time to do what i did, start a WTF bag, i took a zip lock bag and anything that i have no idea about goes in there. that way you won't loose it and you can take it to some one with experience and maybe they can help

Armalite lower receiver retaining pin as I thought, except he got the length wrong, it's a bit over an inch, not 1/2", and I have no idea how it got in there.

And linking Broxa to an MP5............ I have zero clue about cheapo airsoft guns. Broxa sounds more like some NYC brand laxative to me.

Yes it look's like the pin shoud go in that little white tube for reinforcement. Do I win.????

No, you fail. :D

That white tube is part of the safety lever assembly.

The saftey block fits on the white tube, then a screw goes in to hold it down.

In all the work I've dozen on all types of airsoft guns, the only time I've ever seen a pin like that is in Armalites. No other purpose for it, and sure as hell doesn't go into any MP5 I know that is out there.

Keep in mind this is a Broxa, not a TM and even though it is a clone, Aftermath might have decided to stick a mechbox centering pin in there. Check the box to see if there's any holes around that size. It's probably somewhere in the middle of the box.

Still it's a V2 mechbox design, very little difference between the makes, all still same origin. If it was say a Systema PTW MP5................... I wouldn't have even posted in this thread.

Looking at it more in comparison to the mechbox, maybe the size is closer to the 1/2" he said. Now I'm baffled, it isn't any part of a V2 mechbox, but isn't big enough to be an Armalite retaining pin (BTW, in a real Armalite type, is part of the trigger group, there are typically two of them).

I have looked over every piece and there doesn't seem to be a logic placement for it except in the safety where the screw goes into. Come to think of it when I was checking the gears I had it laying at an angle it could have fallen out of there. With it in there the screw still goes in with no problem. Could just be something weird Aftermath did.

There is no place to put a centering pin either. Also it is exactly a 1/2 inch in length.

Ya Broxa is a pretty crappy name, but it is Aftermath... not naming it an "MP5" probably helps with legal issues.

I'll be putting it all together tomorrow night... we'll see what happens.

Edit: Thanks for all the input by the way... even if there is no exact answer.

thats whats best, no one knows where its from, and it dosnt look like it will fit anywhere. just put it back together and see if it works, if it breaks well, it was a broxa and not a PTW not the end of the world :p

Now that I think of it, TM MP5 shells are held together by short split pins that are about the same size. If there is a split down the side of that piece, then that is what is it, a guide pin that somehow fell out of the outer body. They are the same size as you mentioned, it's a body part, not a mechbox part. Hmmm, bet I just burst the puzzle wide open.

Yes, Stalker's right- that's what it looks like. I have a Broxa, and there are 2-4 of these pins all around the split halves of the clear receiver to help position it correctly.

Look carefully around the perimeter of the receiver before you put the halves back together- you'll find a hole that fits it perfectly.

That's what it is; it's not from the mechbox.

Are you sure that isn't the pin from the plastic body that keeps it together? Its usually a curved piece of metal, you should see a opening on the side and its usually hollow.

HA ha ha Aftermath Broxa.:D:rolleyes:

There is no slit on the side, it is solid. There are three guide pins in the receiver but they are about 4x the diameter, closer to an inch long, silver, and there is no hole small enough in the rest of the receiver. When I first saw it I thought it came from the receiver but I was pretty confident it didn't before posting.

All you can do is toss it in the Misc parts bin that you should be starting. Lol

LOL...do a careful reassembly...test to see if it all works and count your blessings when it does.

I have no idea what that pin is from. When you end up with 2-3 bins of spare/misc parts...toss them all into one big bin, shake gently, add a battery and you'll probably end up with a complete AEG.