Leapers SKS reciever cover scope mounts

PerversPépère said:
If you look at the second mount, the one with the adjusting screws, I think it would be easy to make a small steel flatbar that would fit under the screw bosses and be silver brazed or low-temperarure soldered to the receiver.
Then, I'd drill and tap that part to allow two allen bolts to pass through the adjusting screws holes and screw into the reinforced part of the receiver. To remove, one would unscrew the two Allen bolts, then unlock the rear cover latch to slide the mount out.
That way, the anchoring would be ridgid but easily removable.
PP.
Click to expand...

This would work quite well. With mine I simply built up the tabs on the mount by welding and then filed to a slight interference fit on the receiver, then drilled and tapped the receiver. The mount has been removed several times and checked with the boresighter and by shooting, there has been no shift in zero.
 
I tried the same mount and found that the zero hold was a problem. I have a rifle set up that uses a tech sight with a thru bolt to hold the sight at the back of the receiver. I cut the latch pin off and used the bolt on my weaver style receiver cover mount. I fitted the cover as tightly as possible, put in a recoil buffer and cranked down the bolt. It seems to work fairly well, and a new latch pin will restore the rifle to original specs. PS the tech sight is really good and surpisingly accurate.
 
I've seen a similar setup on SKSboards.com, it looked solid and seemed to work well. I think the guy had one of the crappy cover mounts without the set-screws too, which shows how well the tech-sight/cover bolt method works.

I'm fairly sure that a lot of the accuracy issues with these mounts are stemming from the fact that the reciever cover pin is a sloppy fit thru the reciever cover. It's the only part of the assembly that's not 100% tight and locked down. The bolt replacement sounds like it solves the problem, but I would be afraid of "squeezing" the reciever with the bolt and bending both sides inwards. That part was never designed to be clamped tight with a bolt, it was meant to hold a sloppy pin that bangs around with every shot. I've got a few ideas about how to fix this, so I'll keep everyone posted :D Thanx for all the input!
 
i think finding a cover that has tolerances close to the gun is part of the problem, my stock cover has alot of play at the back where its pined down but the front has little to none

diferance on the rear gap is 0.007" (0.510" cover and 0.517" reciver)
front slop is reciver 1.029" and cover 1.029"

My caliper is accurate to 0.001" so take that as you wish

find a way to easly shim out the gap and re-zeroing might not be such a big task
 
I just put Holleyman's mount on my rifle last night, even with the side screws locked down it was sloppy at the back! I'm fairly sure that replacing the cover pin with a bolt will solve the problem. I'm bringing calipers, drill bits, a tap and tap handle and some bolts home from work tonite. I also replaced the crappy hardware on the mount with some stainless 5mm cap screws, they're much nicer looking :D I need to get a digital camera, I'd love to post pics of this whole mess.

I also noticed that the action feels very gritty when I rack the cocking handle, I suspect that the finish of the guide rails in the reciever cover mount is to blame. Guess I need a file and some 600 grit as well :D

I'll keep everyone posted, and give a range report as well when I'm done!
 
When I was looking for a receiver cover scope mount, the first thing I was told was to get a new one. The reason for this is that the covers are longer than the originals and have to be fitted to the rifle. With careful filing one can get a very tight fit. Fit the new cover without the recoil spring, slowly remove metal from the front tangs until the latch or thru bolt can be drifted into place. Done properly, there will be very little movement at the receiver cover. Still, the receiver cover will never be rock solid, just a little better. The only place on an SKS to mount a removeable scope without drill and tap is the rear sight position. Every where else will still move somewhat. But hey, it's still a cheap way to get optics on a rifle that wasn't intended to be scoped and still be reversable.
 
I've heard the same thing, Leapers manufactures their mounts with something like 1/8" of additional length on the front of the reciever cover to allow for different manufacturing tolerances in all models/types of SKS's :redface: Since this mount has been fitted to Holleyman's rifle, there's no way for me to fit it to mine. "I cut it twice, and it's still too short!" lol :p The whole reason for the extra length, though, is to allow the cover to be snugly fitted as emmab mentioned, to the point that the cover pin needs to be tapped in with a hammer (ie; very small tolerances, enough to eliminate movement). If one were able to find a bolt with tolerances that match the reciever cover & latch pin holes, the same result will be achieved. Luckily I have access to a room full of stainless hardware in standard and metric sizes :D If I find one that works, I can grab a handful and make them available for others with this type of mount, since I'm sure there's tons of them out there not being used due to the sloppy cover pin fit :cool:
 
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