m305 op rod handle came off bolt

K

Keith_H

Member
EE Expired
Rating - 0%
0   0   0
Location
Kamloops, BC, Canada
Hi, I had recently bought a new norinco m305 and really like it but experienced a few problems the first time shooting it (please excuse improper nomenclature). After the first few mags I started to experience failure to feed with both mags that were absolutely fully seated on almost every shot with norinco 7.62. After shooting like this trying to see what was wrong and testing the magazines the op rod handle came off the breach block!
Basically what I am wondering is if it is operator error or a problem with the rifle. How critical is it to grease where the op rod handle moves on the receiver? I noticed after that it was a little stiff but still free near the back of the receiver groove. What should I do next? How do I get the op rod out from behind the bolt? Thanks for the help!
 
For one, it's critical that you grease the op rod track... and anywhere else there's metal on metal contact.

To put it back together have a look at m14 assembly/dissassembly videos on you tube. You 'll need to remove your trigger group, take the action out of the stock, take out your op rod spring and spring guide, then reset the op rod in the track on the bolt roller. Then reassemble your rifle.

What exactly is happening when it's failing to feed?
 
The failure to feed is on you letting the bolt fly,or when the rifle cycles for the second shot???

You probably pulled the op rod out of its track at the takeout notch in the receiver. This common when you are not familiar with the normal operation of this rifle. Don't lift the bolt from underneath when pulling it rearward. It needs to be kept down from top to prevent pulling it out in the notch provided for take-down.

We all went through it and it's a great learning experience.

Read all the stickies posted above.

Get to know the normal operating cycle , and take-down/ re-assemble procedure.

Make sure you let that bolt fly forward briskly and unhindered during chambering to fire a live round if you are cycling manually, and trying to determine what the hold up is for the FTF.

This is so that you don't get an out of battery firing. This can happen when you slowly ride the bolt forward and the bolt may be just shy of rotating to fully locked, but might still be able to fire:eek:.

Learn the operation of the rifle, I like the A-zoom .308Win snap cap practice rounds here.No worries about an out of battery, till you sort out the failure to feed.
Good luck.:canadaFlag:
 
Thanks for the great responses! One thing I forgot to mention is that I was watching my friend shoot it at the time this was all happening, so I am not really sure on details. The failure to feed was on the second shot after manually cycling it. We could see scratches left on the cases where the bolt had rode over them. There was a few cases of a partial feed where the bolt closed on the round while only the tip was in the chamber and a few where the gun went click but left no mark on the primer, I assume it was when the bolt didn't lock up properly. I got it apart (I thought it would be an issue having the bolt roller infront of the charging handle) and am ready to put it back together. I found some grease lubriplate 105 lubriplate.com/products/greases/no-105-motor-assembly-grease.html Would that be appropriate?
I was wondering how it could have came off the roller if it was still firmly in the groove? Could it have been damaged from the stress of coming off during fire?
Thanks!
 
Sorry Keith, I was thinking you pulled the oprod out of the track and off the bolt.

So you are saying the op-rod jumped of the bolt roller while the op-rod remained in its track during a firing cycle?
 
I had the same thing happen to me-Once the bolt even jammed in the back of the receiver housing.-My op rod guide was quite loose when this started to happen- but I have been told this has nothing to do with it- I am not so sure - is your op rod guide (not spring guide) loose? The roll pin used to secure it to the barrel is of poor quality, many people replace this pin and dimple(or knurl) the guide contact surface to more securely attach the guide. I am not saying this is the cause , just curious.
 
RememberTheSomme said:
Sorry Keith, I was thinking you pulled the oprod out of the track and off the bolt.

So you are saying the op-rod jumped of the bolt roller while the op-rod remained in its track during a firing cycle?
Click to expand...

I am the friend that was shooting at the time. I fired two twenty round boxes and the rifle progressively got worse. It start to have failures to feed. The bolt would simply slide over the round at the top of the mag instead of pushing the round into the chamber. We also had a few rounds that were dragged via friction and were pinned between the bold and the feed ramps. I belief this these malfunctions were because the bolt had to much trouble sliding back far enough to chamber a round. I think the bolt slid back 3/4 of the way and was then pull back over the rounds causing a failure to feed. Also the bolt would not lock open last round on occasion.

About fifty rounds in the oprod came out of its track. I quickly pulled the oprod charging handle back and some how it got back in its track but the bolt roller was no longer in its pocket in the oprod.
 
You've really got to keep up on the grease on those M305's. What it sounds like to me is there isn't enough grease on the op rod, so the bolt isn't able to go back far enough to chamber a round from the magazine.

The lack of lube could also account for the bolt roller jumping out of the slot in the op rod.
 
On another note, what ammuntion are you usng?- I think alot of people say 175 grain is as heavy as you should go - with the norm being 150 gr, the heavier bullets really slam the gun from what I understand.
 
Keith_H said:
Something like this?
I4cLI.jpg
Click to expand...
Yes like that but with out the magazine inserted in the rifle please.
 
Hey, I'm actually having a similar issue with mine, but its intermittent. Sometimes it will cycle just fine, other times it won't feed the second round or half feeds it when the bolt catches it on the way forward. I've had a gunsmith look at it, although he wasn't an M14 guy. This is my issue: as the bolt travel backwards or is manually moved rearward via the op rod and makes contact with the hammer, it catches and sticks. This makes the action not only feel like crap but while firing removes enough energy that the bolt doesn't travel back as far as it should.

My questions is should I dremmel the channel down slightly on the hammer so the the bottom of the bolt does not catch so harshly on the hammer?

One way to see if you are having the same issue is to manually cycle the action with the oprod. If the first pull back is really rough ( since the bolt is contact the hammer) , then after the hammer locked back, cycle again and if you notice a big difference then we may be in the same boat. I'm just not sure the best way to correct it.

Hopefully this helps.
 
My questions is should I dremmel the channel down slightly on the hammer so the the bottom of the bolt does not catch so harshly on the hammer?
Click to expand...

May the Lord have mercy on your wicked soul.....

Before you start grinding you really do need to figure out exactly what the problem is.
 
You must log in or register to reply here.
Back
Top Bottom