Odd SKS piston?

[Turkinator]

Just stumbled upon this video in YouTube, it's in some other language in assuming Russian. The guy starts to break down his SKS but before he removes his gas tube I notice he already has the piston laying on the table?? Then after he removes the gas tube he uses his gas piston which was not in the rifle to hammer out some part ive never seen before. Is this some sort of gas tube plug to convert to bolt action? I noticed he did have the sks set up for hunting, was this to squeeze what little accuracy out of the SKS he could?

 

[alexD92]

Looks like a gas plug to turn the rifle in a straight pull single shot to "enhance" accuracy.

 

[iger13]

If I know Russian good enough, I think you wright.

 

[Turkinator]

I can't seem to find anything similar to it on the net, curiosity is getting the better of me on this one

 

[Umka]

Turkinator, yes he is using that "plug" for converting sks to "bolt action" mode. He thought it will be more accurate :] It wasn't

 

[Suther]

Turkinator, yes he is using that "plug" for converting sks to "bolt action" mode. He thought it will be more accurate :] It wasn't

Why the plug!? Wouldn't removing the piston do the job without having to worry about some silly plug?

 

[MuthaFunk]

I'm guessing he was worried about the gas blowing back at him if he removed the piston.

 

[Umka]

he doesn't provide any explanation, just mentions that this plug made of titanium and in comments one guy asked what that plug for - author says "experiment. what if..."

 

[Hermid]

I want to know what muzzle break he is using