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 Crsswift70 
Member
Joined: Mar 2009  AL, USA
 Posts: 749 Feedback: 100% (3) |
Posted: 7/13/2012 10:58:31 PM
[Last Edit: 7/13/2012 11:15:08 PM by Crsswift70]
THE IMAGE ABOVE IS A PAID ADVERTISEMENT 
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Posted: 7/14/2012 3:12:42 PM
Is this a "kit-build" rifle? If not, what kind and who made/imported it?
From your second pic, it looks like the cut-outs in the rail may be a little long/wide, like they were filed oversize. These are normally just long enough to pass the bolt through. It is also possible the receiver is a little over-wide at this point. Take some calipers and compare receiver width from front to rear and points in between. How hard are you pushing up to make the carrier come out of the rails? I suppose it may be possible to force the carrier through the bolt slots, but I've never tried that one........ Does the carrier stay in the rail while cycling the receiver normally by hand with the recoil spring and dust cover installed? |
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Posted: 7/14/2012 3:37:29 PM
This is a SAR-1. The cut outs you refer to are shiny and appear to have been worn down by the bolt or by someone filing it (can't believe that though). I will measure the receiver in a sec. I don't really have to push up on it for it to jump out of the rail. I am simply pulling back on the charging handle in a normal fashion. This however gives it a slight upwards pressure. None of my other AK variants have this issue when i do this. If i intentionally push down when charging the weapon, it doesn't jump out. I can get it to do this both with and without the dust cover or spring installed.
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Posted: 7/14/2012 3:53:35 PM
[Last Edit: 7/14/2012 3:55:03 PM by Crsswift70]
Another pic. It looks like something was catching all the way down the rail and "stuttering" along it and gouging it. Are these normal machining marks? I don't see anything on the carrier that looks like it has been doing this. I measured the receiver and it appears to be the same width the whole length.
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radkoch
Member
Team Member
Joined: Jun 2005 TX, USA
Posts: 717 Feedback: 100% (123) Link To This Post |
Posted: 7/17/2012 6:53:24 PM
It almost looks like your front trunnion isn't installed correctly.
Is the barrel canted? Does the carrier have marks on the side from rubbing the rear sight block? I had a WASR10 that the front trunnion was incorrectly riveted in place and it almost looked like the rifle was bent. Mine looked like the barrel was going off to one side and the front trunnion stuck out the front of the receiver about .080 on the right side and the left was flush The only solution was to remove and re-rivet the trunnion. |
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radkoch
Member
Team Member
Joined: Jun 2005 TX, USA
Posts: 718 Feedback: 100% (123) Link To This Post |
Posted: 7/17/2012 6:54:57 PM
The main reason I was wondering about this is that your bolt carrier looks crooked in the RSB
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Posted: 7/17/2012 11:18:47 PM
Originally Posted By radkoch:
The main reason I was wondering about this is that your bolt carrier looks crooked in the RSB That's because the pic is showing the carrier jumping out of the rail on the right side. Before I read the post I thought the same thing. That would have been the worst I've seen. |
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Gunplumber
Master Gunsmith
Team Member
Joined: Jul 2002 AZ, USA
Posts: 1238 Feedback: 100% (1) Link To This Post |
Posted: 7/18/2012 12:10:06 AM
[Last Edit: 7/18/2012 12:11:14 AM by Gunplumber]
Carrier jumping the rail is usually due to a wrong-sized return spring guide.
the $15 workaround is a buffer-tech buffer. The repair is to weld up and recut the guide shorter. Not saying your gun doesn't have other problems, but that fixes 90% of the carrier jumps. http://www.arizonaresponsesystems.com/notes/notesak/aktroubleshoot/pageaktroubleshoot.shtml#anchor1 |
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