Wa Shan or Metal Y.T. Corps Beretta M9 Problem: Slide won't lock and always 3 Bullets at once.

Hi!

This weekend we finally came to use my WaShan or Metal YT Corp Beretta M9 in your filmlet production.
I testet this model a few months ago and it worked fine. But when we filmed it malfunctioned so badly:
It always fired 3 or 4 rounds at once and when it was empty the slide didn't lock, like it normally is supposed to do.
I tried it at home again, wasted many caps and the problem stays.
Nothing is broken, it just wont work properly.
Very sad, I payed 300 euros for it becasue it is metal, and many many cartridges...

Did anybody have this problem too?
I tried to strech the spring in the slide a bit, so it couldn't fire so many bullets at once...
The problem remains, and... bad idea now the slide won't lock after the last shot because the spring is too strong (i guess)...

Maybe anybody can help?

Hi
This thread has some useful points:
https://mp40modelguns.forumotion.net/modelgun-problems-f5/haw-san-beretta-m9-full-auto-problems-t174.htm?highlight=beretta+m9

Stretched spring is a problem, try re-compressing one "loop" at a time over ful length, or maybe chop small section off... dificult to tell without model in the hand.... good luck!!

I re-compressed the spring and tried fireing the WaShan again...

Once I fired 3 cartridges were detonated at once, hammer cocked and slide locked back...
another time it fired one cartridge after another, but the slide wasnt powerful enough to cock the hammer after each shot ...
Cartridges are always cleanly ejected...

The semi/full auto mechanism... I exchanged the screw with a much better and stronger one. I holds in place very solidly. Never turned it on full auto since then as I only need semi.

MAybe tiny internal mechanisms that got slightly bend?
My last WaShan broke its internal mechanism parts as well after fireing it a few times...

regards

Hiya

So the gun is set in Single shot position every time What is curious here is that when it does fire 1 round, 1 only, the hammer follows the slide back to rest in the "closed" position. It cannot, therefore, be travelling fast enough to strike the firing pin hard enough to ignite the next cartridge.
My thoughts are that the slide isn't travelling back far enough ... Recoil Spring problem

However, if it will sometimes fire 3 or 4, as if in Auto, it must be travelling back far enough to allow the hammer to return with enough force to hit the firing pin.
It is, then, bouncing uncontrollably, either not reaching, or missing the Sear and Fire selector switch. It's not always coming back far enough to lock the hammer into the sear, letting it follow the slide back

BadBean wrote:: The semi/full auto mechanism... I exchanged the screw with a much better and stronger one. I holds in place very solidly. Never turned it on full auto since then as I only need semi.

best wishes

Is this screw exactly the same length as the original, or longer Is it interfering with the switches inside I seem to remember having problems getting the slide to pull back when I overtightened the screw to compensate for the damaged thread...
This parts drawing might be useful. It is WaShan, but ignore the Det.Pin shown, WaShan must've copied MGC or Marushin's drawing.
Parts 8 and 9 I think, work with the Selector Switch to control firing. There's a pin on the switch that comes through the slide when set in either Auto or Semi to engage with one of these parts. If yours are bent perhaps, the switch may not be engaging properly.

Wa Shan or Metal Y.T. Corps Beretta M9 Problem: Slide won't lock and always 3 Bullets at once. M92

Wa Shan or Metal Y.T. Corps Beretta M9 Problem: Slide won't lock and always 3 Bullets at once. M92

Stretching the recoil spring may have got you a spring that isn't controlling the slide travel as it should... I'd try checking both spring and screw first.

I hope this helps

_________________
Cerwyn

Hobby collector of Replica model guns and Militaria.
also member of Living History Reenactment Groups.

It seems that slide travels back enough to partially cock hammer, but not lock it completely.
Hammer falls when slide moves forward, detonating the next cartridge.
It also explains why slide doesn't lock back, it just doesn't travel far enough.

I had similar problems with their M84 (slide doesn't lock, but fires single shots), for some reason slide doesn't like to travel as much as it should.
Could be due to weight of the slide... I tried lubricating and polishing various parts to ease movement, but to no avail.

Hi everybody!
Yes...
I know this post is old...
But I still didnt get rid of my problem...

By the time 8ace did repair my slide, thank you very much for that!
And picure bought a new spring for me, thank you too!

So every part in my WaShan M9 is as good as new now!
Rarely fired and fully repaired...

Unfortunately the gun fires 2 shots at once from time to time... not everytime though.
So its not very usefull for filming, as you see two cartridges flying sometimes...

Any idea? Its KSC 9mm Luger cartridges, identical with those of MGC P220 ones...

Its a good working model now. No problems besides the two shots from time to time... bad for filming if the take was good but the gun fired twice^^

what about the det pin maybe its just a lttle bit to long and just catches the rounds on occasions, det pins have to be spot on for these guns or you do get problems

Hey

That could be the reason...
Unfortunately I have no idea of that stuff ...

I dont know, if it's too long or not... It doenst look like...
It can move freely and when relaxed, it doesnt stick out a milimeter.

maybe a specialist here who can find out and maybe repair if i send him? :/

Detonator pin is the one in chamber. If it is too long (or not seated correctly), it will crush cap as cartridge is loaded, instead of when it is pushed by firing pin from behind cartridge.

What you could do to check it, is to put a bit of putty in a fired caps (as much as originally powder), then load it in the cartridges. Rack the slide, rack again without pulling trigger. Disassemble ejected cartridge carefully to see if putty has indentation marks.

This might not be 100% good method, but at least it's a start.

If another member takes some measurements of his model, you could compare - but unless this is an obvious difference (like 1mm), it could be hard to make sure these measurements are properly aligned.

I seem to remember that the Wa Shan det pins fixed in the barrel scratch

8ace

You are of course correct 8ace the pin is fixed, never thought about that but maybe its down to the rounds so badbean have you tried the wa shan rounds or p220 and if so do you still have the same problem if not then the luger rounds are the problem. As we all know here the rounds really do make a diffrence they only have to be slightly out and the gun wont fire or misfires.

KSC cartridges are a fraction too long for my WaShan Beretta. They jam up in the magazine so won't feed properly.
MGC P220 rds work perfectly, no problems whatsoever. However, they're impossible to get these days.
Maybe shortening the KSC cartridges by grinding or filing a little off the tips might help

The Detonator pin is fixed in my barrel, but there's a hardened tip on it that can come adrift. Is this tip firmly in place in your barrel Badbean

_________________
Cerwyn

Hobby collector of Replica model guns and Militaria.
also member of Living History Reenactment Groups.

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