Marushin XM177E2 Bolt Nightmare!

Post by scottmac

Hi

i have somehow managed to break what i think is the firing pin on the bolt for my xm177e2, does anyone know where i can find another one or something i can substitute.

thanks in advance

Post by Mark



Hi scottmac and welcome to the forums!


The Marushin XM177/M16 bolt doesn't actually have a "firing pin" in it so, I wonder just what part(s) that might have broken. The best fix is to contact forum member "francky" and ask him about getting the part(s) that you need as he lives in Japan and he can get the difficult parts that you need to get your XM running again.
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Wanted to buy: MGC Sten MK3....trades?(still)

MGC MP40 Marushin MP40 Nakata MP40 TRC MP40

Modelgun manufacturers, past and present:CMC,CAW,Hudson,HWS,LS,MGC(R.I.P. 1960's~2007) Marushin,Marui,Kokusai,Shoei,Tanaka and Western Arms

Post by scottmac

Hi

The bit im talking about is a metal flat sort of rod thing that was on the bolt and broke off during firing, the gun will no longer fire as. i think this bit when struck by the hammer was forced forward pushing the shell onto another rod which then pushes the caps backwards and firing the gun, or so i beleive. sorry thats come out a bit gobledygook.

thanks fo ryour reply though i will give him a try.

Post by Madmike

That sounds like part # 33. It broke on my XM177E2 once too.

If you are in the UK and do not want to order overseas try www.modelguncollector.co.uk, they can get you spares for the Marushin XM177E2, but it can take a little time if they don´t have the part in stock. I found them very helpful in the past.

Post by Mark



I didn't quite understand which part(s) that you where describing here Scott..There are very few parts to the Marushin bolt that control the firing operation. What I think that you are refering to is the part #33 that is flat and is retained in the bolt carrier with a cross pin. This part does contact the bottom of the cartridges when firing. The cross pin can and sometimes will "walk out" of the bolt carrier and jamb things up. This part is made of stamped steel and it would be hard to break it.
_________________
Wanted to buy: MGC Sten MK3....trades?(still)

MGC MP40 Marushin MP40 Nakata MP40 TRC MP40

Modelgun manufacturers, past and present:CMC,CAW,Hudson,HWS,LS,MGC(R.I.P. 1960's~2007) Marushin,Marui,Kokusai,Shoei,Tanaka and Western Arms

Post by scottmac

Yeah i have contacted modelguns and its definately that part i have broken. Another problem that i have been having is my gun seems to quite often feed two shells at the same time, does anyone have any tips to sort this.

cheers

Post by Mark



Hmm, Do two un-fired cartridges feed at the same time? Or only one un-fired and one fired cartridge. If two un-fired cartridges feed at the same time it is a magazine problem where possibly the feed lips are bent or out of spec. Which magazine do you have?

If one fired cartridge and one un-fired cartridge feed at the same time than that is an extractor problem that is caused by worn bolt components.
_________________
Wanted to buy: MGC Sten MK3....trades?(still)

MGC MP40 Marushin MP40 Nakata MP40 TRC MP40

Modelgun manufacturers, past and present:CMC,CAW,Hudson,HWS,LS,MGC(R.I.P. 1960's~2007) Marushin,Marui,Kokusai,Shoei,Tanaka and Western Arms

Post by scottmac

its the vietnam style mag, 20 rds i think.

it happens when i try to fire two go in so 2 unfired rounds. i will have a look a nd see what condition the lips of the mag are in, i did check to see if it needed filed before but all lokked ok. Another thing i notice is sometimes the bolt does not go fully forward and the this causes firing problems.

Hello Scottmac

The bolt will stick as you describe if it isn't clean and well lubricated. Any 'high spots' in the receiver or on the bolt itelf will cause friction and jam everything up. Even just dirt will jam up your gun.
Feed problems like 2 rounds at a time are usually, as Mark says, either the mag feed lips have spread a little so not holding the rounds in the mag, or the extractor fails to pull the 'fired' one out before sending the next one in...
I wasn't sure if you are getting 1 round to fire and then it jams, or is it total misfire?
Another thing to check is that the detonator pin in the barrel is spotlessly clean.
If that's dirty and corroded, your gun WILL jam every time you try it.
Keep us informed of your progress... let's get your gun working!

Cerwyn
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Hobby collector of mainly WW2 era uniforms, headgear, field equipment and replica weapons.

Post by scottmac

Hi

Thanks for everyones input, When i cock the bolt it goes forward and pushes 2 rounds forward i am going to try and bend the feed lips in a bit because im pretty sure now that you's have mentioned it that that is the problem. Also i have had a look at the detonator pin and its pretty manky so this will be getting taken out and cleaned till its gleaming. i have tested my gun firing on single shot for now with the old bot bit that fell out (part no 33) pushed back in but untill i receive my new one from modelguncollector who i must say have been excellent, (just have to think of a few things to get to the meet the minimum 25 pound order.( i will have to keep it of full auto as the metal part of the bolt falls out. Hopefully soon it will all be working perfectly though.

Hiya scottmac,

Be sure to let us know how you get on with it, all your experiences with it it will be of help to the rest of us too

Cerwyn
_________________
Hobby collector of mainly WW2 era uniforms, headgear, field equipment and replica weapons.

Cerwyn wrote:

The bolt will stick as you describe if it isn't clean and well lubricated. Any 'high spots' in the receiver or on the bolt itelf will cause friction and jam everything up. Even just dirt will jam up your gun.

Oh boy, I have the shiniest bolt and interior of the upper receiver, yet bolt still sticks between hammer and upper in the back position...

...and to add to insult it ignores bolt stop when it eventuall decides to slam forward after a lot of nudging. At least I know now that forward assist has been invented especially for Marushin kit models ;-)

Edit:
As the bolt was left in the back position when I moved it for the first time, I thought M16 is an open-bolt system, and wondered why I can't pull the trigger ;-)

Hi smootik,

You'll have looked through the Marushin M16/XM177 specific category and already spotted many, many different threads all entitled "Bolt Problems", "Build Problems", "... Problems" "... Problems"
It's unfortunate that Marushin's series of M16/XM177 are just bereft with problems. My suggestion would be to view Lucifer's series of videos detailing building and tuning the XM177. Even though the text is in Japanese, there are plenty of photos that may just give you an answer.

JohnnyV posted up some improvement modifications too which may help.

Doc will have built a few of these kits, hopefully he'll recognise the problem and have an answer to hand.

The Forward Assist sure is useful... just goes to show that even real ones had problems. Marushin do produce a very faithful replica, even some faults are built in

Sure :-) I'm just venting ;-)

Just so my efforts don't go in vain I wrote down most of my observations and took some photos. These should get posted the next week, after I have time to go over it again.

In any case Hudson's models and Marushin kits show that it's much easier to manufacture parts than design them for a fully working modelgun.

Vent away smootik , a problem shared is a problem halved as they say
There's nothing quite as frustrating as a problem like this. Sometimes these problems add to the satisfaction of building a kit, at least when the problem's solved the resulting satisfaction makes it, almost, worthwhile

This problem recorded and photographed will be invaluable smootik. Others will, without doubt encounter these problems again so a well documented record of problem, cause and cure will be worth your efforts.

Marushin's Factory assembled models, including the M16 and XM177 must work reasonably well, I'd hope, but then again Marushin's assembly team must know these models inside out. Is there anything in the Japanese magazine article
https://mp40modelguns.forumotion.net/t1148-marushin-m16-xm177e2building-kits-additional-help-in-pictures that may help