Question (now answered) re: SKS Optics, Sights and Mounts Sticky post 111

[Flying Beaver]

Hi all,
Maybe someone can help me out with id'ing a photo posted at the end of the SKS Optics sticky.

http://www.canadiangunnutz.com/forum/showpost.php?p=6222967&postcount=111

As I mention in my post there, I am at a loss trying to figure out what piece of hardware is shown in the upper of the two pictures, and how it fits/attaches/relates to the modified SKS dust cover sight mount shown in the lower picture.

I've been running VZ-58's and CZ-858's for some years now, and I think I can identify all the different ideas for modification and scope attachment that have come along.

However, I'm a new SKS owner, and after staring at this pic, re-sizing it, comparing it to my SKS rifle, I'm no further ahead in identifying what is shown in the top photo of the two pictures posted. I'm puzzled, and it may be so obvious that everyone can have a good laugh at my expense. Even so, I sure would appreciate some assistance in id'ing this piece of "mystery hardware.

Go ahead and laugh.
If the answer is stupidly obvious, I can take it if the laugh's on me.
My curiousity bump is driving me right 'round the bend.

Whoever reveals the answer gets a cookie.

 

[Juster]

I am at a loss trying to figure out what piece of hardware is shown in the upper of the two pictures, and how it fits/attaches/relates to the modified SKS dust cover sight mount shown in the lower picture.

A steel block is supplied with a hole through it for the takedown lever. A set screw fixes the block in place. You now have a a no-gunsmithing tapped receiver to screw the custom top cover to.

 

[Juster]

 

[Flying Beaver]

A steel block is supplied with a hole through it for the takedown lever. A set screw fixes the block in place. You now have a a no-gunsmithing tapped receiver to screw the custom top cover to.

OK. So if I have this straight, we have:

Into/Onto that goes this (which shows both the cover and the steel block, plus the attachment screw, on which appears to be a large knurled ring that could be turned by hand):

Which in turn attaches to this:

Is that more or less what the various pieces are, and how they fit together?

I cannot tell if the hole in figure #1 that I've labeled "tapped hole for cover attachment" is in fact tapped, or if it is a plain hole to accept a pin.

All of which leads to one last question:
Is this a one-off that you made yourself, or is this a prototype of an item that is being or will be manufactured?

Thanks for helping me to unfrazzle my curiosity bump.

FB

P.S. Juster, thank you! Reading the post below, the light bulb just came on. The large bolt with the "X" milled into the face is not part of the round piece with threads on the outside, that I've labeled - incorrectly - "Threaded section for attachment of cover to receiver". The round piece threaded on the outside is the back end of the modified dust cover, and has a hole in it for the X-head bolt. The screw-on ring is there to thread on and cover up the gap and keep dust, water, oil, crud etc. out of the receiver. Sweet.

 

[Juster]

"Tapped hole for cover attachment" accepts the big screw with the X milled in it, as you tighten that the receiver cover moves forward until it is jammed solid.
You don't use the takedown latch, it no longer moves. There is a screw-on cover over the Big Screw as a luxury.
I bought it from sksman, I don't know if they still make them.
The rings aren't perfect, I needed to loctite the screws in. You could cut the rings off and screw on a rail I suppose.
It works very well otherwise, a clever design.

 

[Flying Beaver]

"Tapped hole for cover attachment" accepts the big screw with the X milled in it, as you tighten that the receiver cover moves forward until it is jammed solid.
You don't use the takedown latch, it no longer moves. There is a screw-on cover over the Big Screw as a luxury.
I bought it from sksman, I don't know if they still make them.
The rings aren't perfect, I needed to loctite the screws in. You could cut the rings off and screw on a rail I suppose.
It works very well otherwise, a clever design.

Thanks for the info. I believe I understand it correctly now - see my P.S. to post #4 above. All has become clear.

I don't see it on the SKSman site anywhere - possibly a discontinued item.

The dustcover mount I have is a different design to others I have seen - it has an integral Weaver rail bolted to a milled flat along the top centerline but with no riser, and uses standard rings. It's similar to the Leapers model with a single Weaver rail that Marstar sells, but the rail attachment is different.

I have had the thought that if I came across another like the one I have now, I could fabricate a "mating block" to mount semi-permanently to the receiver, and then mill or cut/file out the corresponding under-part of the weaver railed dust cover. A large Allan-head bolt would tie the two together. Similar concept - I like the forward-pressure idea in yours better.

What the heck - maybe I'll order a cover from Fitco or someone who has railed or ringed covers, and do some hack/slash work to separate the "lockdown pin" portion from the rest, then weld on a couple of tabs for a setscrew, and to accommodate a large bolt coming in from the back.

This does not look beyond the range of a reasonably equipped home workshop. Might be a fool's errand, but it would be fun to try.

I have also come across another interesting optic rail mounting method, and have written a brief summary here:
http://www.canadiangunnutz.com/forum/showpost.php?p=6228257&postcount=113

Cheers,

FB

P.S. I.O.U. one cookie.

 

[Juster]

The L-shaped bit on the left is held in place by the takedown pin, an adjustment screw makes it a solid extension of the receiver. The screw with the big cross head screws into the L-shaped bit, securing the replacement receiver cover.