Garand Op-Rod Coming Out If It's Track

iH8DemLibz · Apr 19, 2017

Went to the range today and this happened: The Op-Rod on my South Korean Garand is coming out of its track when I load a full clip and push the bolt forward to strip off the first round.

Looks like it's slightly above where it should be. The bolt goes fully into battery. Once I get the Op-Rod set in place, all eight shots go off without a hitch. When I inserted another fresh clip and pushed forward, it did it again.

Worn out receiver? Worn out Op-Rod? Would pushing slightly up or slightly down on the bolt handle, when driving the bolt home, make a difference?

Thanks in advance for any and all help.

Inigoes · Apr 19, 2017

Is the op-rod bent?

K31 · Apr 19, 2017

This?

http://www.thefirearmblog.com/blog/2016/04/01/bizarre-m1-garand-malfunction-operating-rod-dismount/

A lot more chit on CMP about this, apparently it's a common occurrence.

iH8DemLibz · Apr 19, 2017

Inigoes said:
Is the op-rod bent?

It does look bent. But in an odd, it was made that way, kind of bent.

Not bent sideways. Bent like it's formed to the large taper of the barrel.

iH8DemLibz · Apr 19, 2017

K31 said:
This?

http://www.thefirearmblog.com/blog/2016/04/01/bizarre-m1-garand-malfunction-operating-rod-dismount/

No. The clip stays in place. The pocket for the bolt tab is above the bolt tab.

Inigoes · Apr 19, 2017

iH8DemLibz said:
It does look bent. But in an odd, it was made that way, kind of bent.

Not bent sideways. Bent like it's formed to the large taper of the barrel.

Op-rods do get bent out of alignment when shooting regular 30-06 ammo, instead of the M2.

iH8DemLibz · Apr 19, 2017

Inigoes said:
Op-rods do get bent out of alignment when shooting regular 30-06 ammo, instead of the M2.

It eats M2 Ball surplus only.

I've had the gun for nine years. First time it's happened.

Just had CMP put a new Criterion barrel on her too.

A1Uni · Apr 19, 2017

It very likely is not bent (any more than it is supposed to be), but rather the tab on the end of the rod that holds it in the track is worn down and out of spec.

That is a primary wear point on Garands.

iH8DemLibz · Apr 19, 2017

Hooray Numbers!

Let me grab my measuring goodies.

Thanks.

Me thinks it's time for a new one. My tab height is .076. Not seeing a number on the pic provided.

iH8DemLibz · Apr 19, 2017

A1Uni · Apr 19, 2017

Oh ya, that looks toasty even without throwing a micrometer on it.

iH8DemLibz · Apr 19, 2017

A1Uniform said:
Oh ya, that looks toasty even without throwing a micrometer on it.

Thanks for the confirmation.

Time to start calling around.

CMP? Fulton? Other reputable vendors?

Orlando · Apr 19, 2017

op rod tabs can be rebuilt by Columbus Machine or can trade yours in on a rebuilt one from CMP

iH8DemLibz · Apr 19, 2017

Orlando said:
op rod tabs can be rebuilt by Columbus Machine or can trade yours in on a rebuilt one from CMP

For less than $360.00 I hope.

Cuzz that's rape. Cuzz they know your Garand won't operate without a properly sized Operation Rod.

There's always JB Weld.

Orlando · Apr 19, 2017

Actually your tab doesnt look that bad or terribly undersized. I'm not convinced thats the issue
You may be pulling it out of the track
When you pull the op rod back , pull straight back. If you pull back and up you can pull it out of the track.
Just make sure its not human error
Another possibility is worn receiver rail, not very common though.

If you are using calipers you cant get a accurate measurement, you need to use a micrometer

Tab/Lug Height: .320 to .317 (under .310 calls for rejection)
Tab/Lug Thickness: .100 to .095
Tab/Lug Width: .265 to .235
Tab/Lug Hang .070 to .055

iH8DemLibz · Apr 19, 2017

CMP item #CS106.....Op-Rod Exchange.....$75.00. Heck of a lot better than 360.

Will try and correct Human Error first.

Thanks to all for the help and guidance.

Jim12 · Apr 19, 2017

Lots of Garands and Garand stuff usually at Chantilly, too.

A1Uni · Apr 19, 2017

If you are able to pop it out during normal operation, it is not you, period.

Those are battle rifles, designed to operate reliably under the worst conditions. Coming lose when charging isn't normal, no matter how hard you pull.

Repair or replace it.

Orlando · Apr 19, 2017

A1Uniform said:
If you are able to pop it out during normal operation, it is not you, period.

Those are battle rifles, designed to operate reliably under the worst conditions. Coming lose when charging isn't normal, no matter how hard you pull.

Repair or replace it.

Not trying to argue but you are incorrect.
A completely inspect op rod can dismount if you pull back and up, the more wear (still in spec) the tab has the easier it can dismount
Its a very common occurance for someone who isnt familiar with the Garand

A1Uni · Apr 20, 2017

Orlando said:
Not trying to argue but you are incorrect.
A completely inspect op rod can dismount if you pull back and up, the more wear (still in spec) the tab has the easier it can dismount
Its a very common occurance for someone who isnt familiar with the Garand

Yeah, I have no idea what I'm talking about, even though I stock, sell and fix them professionally.

Garand Op-Rod Coming Out If It's Track

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