New M305s binding operating rod and misaglined rod guide and piston - Help?

So the barrel gas port and flash suppressor are in the 6 and 12 o'clock positions but the oprod guide and the gas cylinder are in the 6-7 o'clock position. What's going on here?

nmf3tx.jpg


Here you can barely see the allen key inside the bore and on and angle as it enters the properly positioned barrel gas port from the 6-7 o'clock canted gas cylinder exhaust port.
 
DarceMegarce said:
Yes I agree that's where it "wants" to be but that's not the 6 o'clock position and I'm still not convinced that the barrel is out of index. Can you tell if it's indexed by the positioning of the ramps in the breech?

I'll work on the down the bore shot!
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according to 45ACPKING, the feed ramps should not be used as a measure of the index of the barrel, only the gas port
 
if you're absolutely sure that the gas port in the barrel is at the 6:00 position (with the rifle right side up), then I would say that the spines cut into the barrel for the gas cylinder and the groove for the op rod guide pin are out of alignment.

can someone with more experience provide an alternative explanation?


as for the allen key, is that the largest diameter key that will fit into the gas port (alone)?
I ask because I'm wondering if the bore of the gas port is exactly at 6:00 and lining up with the bore of the exhaust port in the gas cylinder.
 
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if that's the case, the gooves in the barrel for the splines on the gas cylinder have been cut out of the alignment.
i would suggest asking some of the more experienced guys here (such as 45APCKING or Tactical Teacher) for their opinion on how bad this is.

I would think that if your took the roll pin out of the op rod guide, peened the bossed area on the barrel to tighten the fit and then locktited the op rod guide to the barrel, the op rod guide should stay in place. again, the mis-alignment of the gas piston to the front end of the op rod should not push the op rod guide back out of alignment.
 
Yes that's the largest key that will fit in as the barrel gas port hole and the gas cylinder exhaust holes are not perfectly aligned. I don't think the bore of the gas cylinder is in the 6 o'clock position but I will take a closer look...

ETA: the exhaust hole in the gas cylinder looks to be centred and the entire bore of the gas cylinder is in the 6-7 o'clock position so it must either be the barrel's splines or the gas cylinder's lands!

If it will be fine for me to securely fix the oprod guide in the 6 o'clock position and leave the gas cylinder canted then I think I should be okay!

If it causes damage or terrible consistency issues to have the piston and oprod misaligned I would probably need to find a better fitting gas cylinder? How can I tell if my splines were cut off centre and it's buggered? Or can I fix that?
 
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You could get the Dlask Arms M305/M14 adjustable gas block. The difference is the threading on them 1 is M14 for the Gi barrels the other is for the Chinese one.


You just line the system up and use the 2 screws on it to tighten it down were ever you want it. That allows you to adjust the gas system to make it correct when things are a little off.

http://dlaskarms.com/products/m14-adjustable-gas-lock
 
Okay well look at this! The splines for the gas cylinder are in line with the splines for the flash hider which is in perfect position!

So do I just need to find a new gas cylinder?!

wbevys.jpg
 
DarceMegarce said:
Okay well look at this! The splines for the gas cylinder are in line with the splines for the flash hider which is in perfect position!
So do I just need to find a new gas cylinder?!
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look at the gas cylinder then. there should be splines at the 12:00, 4:00 and 8:00 positions. Does the 12:00 spine line up with the vertical axis of the gas cylinder?
If it does, then it is the barrel that is out of index, and the gas port is not truly at 6:00

And look at the flash hider. Does the spline at the 12:00 position line up with the vertical axis, and the sight post?

BarrelPic2.JPG
 
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Odd Shot said:
look at the gas cylinder then. there should be splines at the 12:00, 4:00 and 8:00 positions. Does the 12:00 spine line up with the vertical axis of the gas cylinder?
If it does, then it is the barrel that is out of index, and the gas port is not truly at 6:00

And look at the flash hider. Does the spline at the 12:00 position line up with the vertical axis, and the sight post?

BarrelPic2.JPG
Click to expand...

To my eye it looks like the splines for the gas cylinder are in good alignment it's just the cylinder itself that's canted;

2i1m68i.jpg
 
DarceMegarce said:
Okay well look at this! The splines for the gas cylinder are in line with the splines for the flash hider which is in perfect position!

So do I just need to find a new gas cylinder?!

wbevys.jpg
Click to expand...

Can you bring it up to me here in the Georgian Bay area? I might be north of your area... It's too painful to look at the pics since I want to get my hands on it NOW! :D

Or you can bring it to my Trenton Clinic in 15-16 March.... :)

Cheers,
Barney
 
DarceMegacre, can you post pics of the gas cylinder from the muzzle end which shows the splines?


Barney! How ya doing! Hope you had a great Christmas and New Year's!
 
TacticalTeacher said:
Can you bring it up to me here in the Georgian Bay area? I might be north of your area... It's too painful to look at the pics since I want to get my hands on it NOW! :D

Or you can bring it to my Trenton Clinic in 15-16 March.... :)

Cheers,
Barney
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Hey Barney thanks for the offer! I may actually be around Georgian Bay in a month or so and I was hoping to bring my M305 with me and shoot it at a friend's farm so I may just take you up on that offer.

From what you can see here do you think it's likely it's just a wonky gas cylinder? Can you recommended a place where I can find a cheap Norc replacement for now to test the fit? The EE maybe?

Thanks for looking over my thread!
 
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