Archived Posts » 59,757,950
MAK90 Build
2/23/2010 3:57:40 PM
I got the MAk90 kit riveted into the Elk River receiver and it went well except for one issue. The bolt will not cycle without the help of a rubber mallet. (Sticks in the back 40% of receiver.) I mean this thing sticks pretty good.
Please note I have not cycled any live rounds yet!
After spending an hour cleaning and deburring everything again, it was a little better but still not go. So I stepped back, had another 7&7 and thought of my options.
After trying all kinds of stuff I found when I remove the safety lever from the receiver the bolt cycles effortlessly, back and forth. Cool I might have found the problem. It appears as if the lever is pinching the receiver enough to impede the bolt travel.
I just wanted to ask if anyone has ever run into this issue and if there is an easy fix before I start redesigning/adjusting the safety lever.
Thank you, Robert
Please note I have not cycled any live rounds yet!
After spending an hour cleaning and deburring everything again, it was a little better but still not go. So I stepped back, had another 7&7 and thought of my options.
After trying all kinds of stuff I found when I remove the safety lever from the receiver the bolt cycles effortlessly, back and forth. Cool I might have found the problem. It appears as if the lever is pinching the receiver enough to impede the bolt travel.
I just wanted to ask if anyone has ever run into this issue and if there is an easy fix before I start redesigning/adjusting the safety lever.
Thank you, Robert
2/24/2010 6:18:09 PM
I think I may have fixed it.
I took the selector lever out and I sanded a little off of the contact point where it touches on the inside of the receiver. It helped but not a whole bunch.
I then put the lever in the vise with only the outer contact area (the round end) resting on the jaws. I then gave a couple of good whacks to the attach point (the point where the squeezed together, looks like a rivet) It opened up the washer/contact surface.
To my surprise the bolt functions nice and smooth like it should and after a little adjustment to the stamped leg of the lever, the safety functions fine and keeps a nice contact with the receiver.
P.S. sorry for the remedial descriptions, still new to the AK world.
Robert
I took the selector lever out and I sanded a little off of the contact point where it touches on the inside of the receiver. It helped but not a whole bunch.
I then put the lever in the vise with only the outer contact area (the round end) resting on the jaws. I then gave a couple of good whacks to the attach point (the point where the squeezed together, looks like a rivet) It opened up the washer/contact surface.
To my surprise the bolt functions nice and smooth like it should and after a little adjustment to the stamped leg of the lever, the safety functions fine and keeps a nice contact with the receiver.
P.S. sorry for the remedial descriptions, still new to the AK world.
Robert
2/26/2010 4:55:57 PM
I was going to comment that the chinese receivers were1.5 and the elk river are1.6 .....not much but just enough! I built two chinese kits on elk river receivers, and they both needed some tweaking!
post some pics...
here's a MAK90 kit I built on a Elk river...
post some pics...
here's a MAK90 kit I built on a Elk river...
