AK74M Selector Switch Issue

[Sharpe's Revenge]

I've decided to explain my issue with pictures to make it clear. I'm using a Version 3 KA Reinforced Mechbox Shell for this.

First picture: All three pieces (labeled 1, 2, 3) are lined up properly, and safety works, will not fire.



Second Picture: selector switch transitions smoothly to semi, no problem, weapon fires on semi.



Third Picture: Suddenly... WTF? Things won't line up properly. The teeth of parts 1 and 2 line up just fine, but will not seat with the nub on part 3.



Fourth Picture: Try and fix it the other way... part 2 and 3 line up, and then suddenly the teeth will not! The red squared portion shows where the squared "tooth" on part 1 refuse to integrate with the teeth on part 2.



I am aware of the slightly damaged teeth on part 2. The issue isn't that the teeth won't grip each other... its that part 2 will not seat properly when the slide is in the fully auto position.

I feel like there is something obvious I'm missing here... the gun fired on full auto fine last time it was gamed. I dont do my own mechbox internals work, so my overall knowledge is only basic.

Anyone see an obvious error?... and please... be gentle.

[Dusti69]

are you having this problem while its in the ak's receiver? i would think that the receiver would keep that number 3 part in place. you could always get a new selector switch set or try a dif set on it whether you have spares or can borrow some off a friend

looks like a pretty nice gearbox though

[Sadiztix]

that's a dboys mechbox and yes the selector switches suck balls on them
replace with a cheap element from ebaybanned

problem solved

[Dusti69]

Originally Posted by Sadiztix

that's a dboys mechbox and yes the selector switches suck balls on them

no offense, but he just said it was a ka gearbox or at least the shells are. with no mention of d-boys what tells you any part of it is d-boys?

[byblos]

screw on the metal fire mode switch (or whatever you call it). try it now.

also, on fullauto, can you move piece # 3 a little to the left so the nub can be aligned in the hole again?

[Ktown Militia]

is part 3 maybe getting stuck or having issues moving??? check to see if its path is clean and no debris.

If all else fails buy new selector gear parts.

[Sharpe's Revenge]

Unfortunately part 3 cannot move any further to the left... checked and it is undamaged and nothing internal is in the way. Is it possible part 1 is backwards or something??

Hahahah worst case scenario I'll let my gun doc fix it... unfortunately I'm selling this gun right now and was hoping to ship it monday, after 3 weeks of paint stripping, and re-painting.

What i dont get is that this gun was firing full auto like a month ago, no problems... nothing has changed!

[Dusti69]

yea thatd be some crap having to buy new stuff for a gun youre selling.
you could just forget about the problem and state this minor problem then knock a few dollars off your selling price and let the buyer worry with it

[Sharpe's Revenge]

Yeah but he did mention he doesn't really know how to fix anything on guns already. I'm sure its something super simple that I'm missing.

[Dusti69]

i still dont see what the problem with it is and why it wont work after screwing the selector lever on.
id think that after you have it in the receiver and the selector lever screwed on snugly those parts wouldnt slip out of place like that.
are the connecting corners of the hole and nub in the parts 3 area rounded off? id assume that if there was enough force there to wear the teeth off part 2 then thered probly be enough to put wear on the hole and nub and round them enough so that they dont stay in place any longer

buying a new selector set is most likely the best and only way to solve this

[Mitchell12]

Has the safety ever worked properly? If not it may just be a bogus part and you could just dremel it and elongate that hole to allow more travel. Though it does look exactly like all my v3's.

[Sharpe's Revenge]

Well thats the odd thing.... it worked perfectly a month ago. I tried screwing it into the body... there is no wear on the actual lever part of the outer body, and yet when it is depressed fully into the "auto" position, the gun will still only fire on semi, since part 1 is never pushed far enough to reach full auto.

Beleive me, I've tried everything short of melting the damn thing to make it give me a bit of flex and fit properly... that damn nub on part 3 just will NOT fit once the teeth are lined up.

[Dusti69]

are the gear teeth on the other side lined up properly with the selector plates teeth?
take a pic of that and post it. the problem might be with that or something small internally

[Styrak]

Sharpe, you say you tried to "depress it fully into the auto position". You realize that from safe, you'll hit the auto setting before you hit the semi setting right? When it's all the way opposite from safe it will be in semi.

[Sharpe's Revenge]

Styrak: Interesting... but thats not how this one seems to work. When part 1 is turned as far counter-clockwise as it will go (which it can only do with part 2 removed) it fires in full auto. Anything other than that position and the gun fires in semi only, or not at all.

However. that is an interesting point. With the gun fully assembled, the selector switch fully to the bottom fires in semi, the middle doesn't fire at all, and the top is safety.... I'm not sure what any of that actually MEANS...

Dusti69: I've looked at the teeth on the other side and they seem to be properly alligned, but I'll take a picture later today and show you. Gah I hope its not an internatl issue... if it is I wont be fixing it myself thats for sure.