(ADVICE NEEDED) 10.5 Norc Upper Issue

That honestly should not affect it to the point of failure. You can get a hydraulic seal (not sure thats the best name) and increase pressure if there is a lot of liquid around the base of the cartridge in the chmaber -- but a bit of CLP on the bolt face is not a major issue, and a weak ejector is suspect.
 
Okay i agree that the ejector spring needs to be replaced, I'll make an order to Wolff on that.

As for the burr issue on the ejector pocket and the ejector itself there is some.
What do I do about that?

I tried the brass test and the gun was fully cleaned after firing so nothing came out. The brass rocked fine it seemed. The issue is not lube related.

Thanks
 
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johhny12gauge said:
Okay i agree that the ejector spring needs to be replaced, I'll make an order to Wolff on that.

As for the burr issue on the ejector pocket and the ejector itself there is some.
What do I do about that?

I tried the brass test and the gun was fully cleaned after firing so nothing came out. The brass rocked fine it seemed. The issue is not lube related.

Thanks
Click to expand...

If the ejector rocks - then it is functioning, if it feels light or mushy, replace the spring -- to fix the burr on the ejector pocket your going to need to lightly ream it, and replace the ejector.
 
Okay so the ejector spring will be replaced but the ejector itself needs to go too your saying?
What's a good place to order both or at least the ejector?
 
johhny12gauge said:
Okay i agree that the ejector spring needs to be replaced, I'll make an order to Wolff on that.

As for the burr issue on the ejector pocket and the ejector itself there is some.
What do I do about that?

I tried the brass test and the gun was fully cleaned after firing so nothing came out. The brass rocked fine it seemed. The issue is not lube related.

Thanks
Click to expand...

if its a ejector spring for sure then pm your address ill send you some factory Colt ones for free.
bbb
 
If the ejector is burred -- you can kiss it with a very fine stone -- but honestly it a $5 part from Colt so best to start afresh with a new quality part.


I'll be honest though- if any gun does not run from the factory, send it back.

However I will also caution - that if you buy some weak ammo, then its all on you...
 
I ordered an:
-extractor spring
-ejector spring
-ejector
When they come in and get I get a chance to test i'll post a reply. I hate it when people ask for help but when they try what people tell them they don't write in to report.
Thanks for all your help and Merry Christmas to you and your families.
 
The ejector & extractor spring is to heavy on some of them which is causing the issues. The importer is ordering new springs for those that need them. They've already sent one that wasn't functioning properly to one of the most respected armourors I know of and they fixed it by replacing the springs. This has only happened on a small number of 10.5" guns and no 14.5" guns that I'm aware of. Once the springs are in I'll post on here.

Ryan
 
So, finally made it back to the range.

Detailed cleaning, and initial 20rds (IVI 55gr), no issues.

Then apprx. 20rds MFS, no issues.

The continued with MFS, and started to get double feeds, partial feeds, bolt partially fwd. Even on empty mag, the bolt would be further fwd than normal.

I am thinking gas...

So, to do what I could at the range, I replaced the buffer with a SPIKES H2 and new spring, same issue, but became 1 rd, then stoppage, repeat...

It was -10 and sunny.

The rounds would eject without issue. It seems to be power (gas) related.

ADVICE?

SFRC has been great and has offered a replacement ejector spring, but I do not think that is my issue.

Thisi smy first experince with such a short carbine barrel. I am use to the standard 14.5...

Advice?
 
If as you suspect, there is a gas issue, that is, undergassed, then switching to a heavier buffer will make it worse.

Also, you seem to be having this problem when shooting the MFS ammo, that may be under powered.

Try using an H, or even a C buffer, and standard spring, with decent ammo, known good mags, and properly lubing the gun, as in wet. Change only one part at a time, and note the results.

Also, check to see if the bolt catch is rubbing on the underside of the BCG, or whether it is operating properly, and not sticking in the up position. you stated that when held open on an empty mag, the bolt is further forward than normal, so this may be causing the issue.

Regards.

Mark
 
I thought we had covered this. MFS = underpowered ammo. Shoot another brand - ANY other brand - and your gun will work fine.

Secondly, put the lighter buffer back in. The H2 buffer will make it LESS reliable with underpowered ammo - not more reliable.
 
Tried various ammo.

IVI, MFS, RUAG, and AE. All the same outcome.

Agreed on the buffer. However, no chnage once replaced with the factory Armalite buffer.

Gas key seems to be staked just fine.
 
Lubed? Check!

Different ammo? Check!

Different mags?

Gas key staked? Check!

Gas port correct size?

Gas port properly aligned with gas block?

Gas tube correctly aligned?

Different buffers? Check!

Gas rings in place?

Bolt stop functioning correctly?

Sorry, that's all I can think of right now.

Regards.

Mark
 
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