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Posted: 9/2/2011 1:57:21 PM EDT
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I am seeing a repeating issue with my krink where the bolt carrier sometimes fails to go back into battery. When I fire a ton of rounds it seems to "warm up" and run fine, but not at first. When charging the rifle, I can get the carrier to sometimes stick on the hammer despite polishing the hammer and parts of the bolt carrier. The good news is when firing it, the carrier doesn't jam on the hammer...just near the chamber. My concern is maybe the rails are bent slightly or something in the gas tube may be deformed a slight bit. My Polish UF did that at first, but I polished it a bit and fired about 200 rounds and it runs like a top now.
I have fired hundreds of rounds through it so it's well broken in. Any thoughts on a fix? New recoil spring? Thanks. |
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Replace your recoil springs with some good ones like from wolf I think they make them for ak's you will see a world of difference if it is just ever so lightly hanging up new spring can solve this. In krinks though not sure of pressure to manage proper operation of bolt carrier. this is where I would start.
here is a link! WOLFF |
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The first thing to do is check for binding or interference between the piston and gas block..
Remove the magazine. Remove the cover and operating spring. Hold the trigger down and cock the hammer. While holding the trigger down, run the carrier back and forth. Does it move all the way to the front freely? If not, note where it stops. |
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Thanks Poly. I tried that and it's definitely hanging up on the rails. The right side of the carrier snugs pretty tight on the rail. My Polish UF is quite loose and wobbly, but this one is tight.
The good news is I shot 150 round yesterday with no jams, but is there anything I can do to open it up on the side of the carrier? Here is a pic: 
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Quoted: Thanks Poly. I tried that and it's definitely hanging up on the rails. The right side of the carrier snugs pretty tight on the rail. My Polish UF is quite loose and wobbly, but this one is tight. The good news is I shot 150 round yesterday with no jams, but is there anything I can do to open it up on the side of the carrier? Here is a pic: http://i788.photobucket.com/albums/yy166/orkman2000/krink_slug2.jpg Small file. You can cut down a larger file if needed. One about 2" shorter than the rail in question should do. Lay it flat on the inside of the rail (or whatever surface is binding) and work it back and forth. Should eliminate any high spots just fine. . |
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Quoted:
Quoted:
Thanks Poly. I tried that and it's definitely hanging up on the rails. The right side of the carrier snugs pretty tight on the rail. My Polish UF is quite loose and wobbly, but this one is tight. The good news is I shot 150 round yesterday with no jams, but is there anything I can do to open it up on the side of the carrier? Here is a pic: http://i788.photobucket.com/albums/yy166/orkman2000/krink_slug2.jpg Small file. You can cut down a larger file if needed. One about 2" shorter than the rail in question should do. Lay it flat on the inside of the rail (or whatever surface is binding) and work it back and forth. Should eliminate any high spots just fine. . I'd recommend a small fine file. Just go slow, check often and remember the old saying that it's easier to remove material than it is to add it. |
Ok, before I got the file out...I looked at it compared to my AKS-74. The krink carrier ran smooth in the AKS-74, so I knew it had to be the rails. It looks like the rail bends upwards a bit near the trunnion where the right side top rail cuts in a tad. I can see the wear on the finish right there where the carrier gets tight moving forward.
So should I put it in a vice and hammer it down? Or try and bend it? Thanks for everyone's help. |
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Success. Thanks everyone for your help.
I lightly filed the hump on the top right rail, and then noticed the rails were snug really tight against the carrier. On my 74 and 47 there was a small bit of movement allowed from side to side, but on the Krink there was zero movement. So I lightly filed them on the sides of the rails, checked movement, lightly filed etc. Now the carrier slides over the hammer and drops right into battery as it should. I guess I have to go fire it for a complete function check. |
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Quoted:
Good deal man! Judging by this pic I thought you knew it was rubbing on the sides. http://i788.photobucket.com/albums/yy166/orkman2000/krink_slug2.jpg Yeah I'm a slow one, but once I smoothed the bend a bit, I kept looking and thought, "man, it's just really tight in those rails. I bet if I file them..". |
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Quoted:
Yeah I'm a slow one, but once I smoothed the bend a bit, I kept looking and thought, "man, it's just really tight in those rails. I bet if I file them..". In situations like this, "slow" is best. Take the time to get the diagnosis right, then take the time to solve it properly. |
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Quoted: Quoted: Yeah I'm a slow one, but once I smoothed the bend a bit, I kept looking and thought, "man, it's just really tight in those rails. I bet if I file them..". In situations like this, "slow" is best. Take the time to get the diagnosis right, then take the time to solve it properly. Yep, you did good. . |
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