To determine if an SKS barrel is pinned, first visually inspect the front sight block and the area where the barrel meets the receiver. Look for a small pin or stake that secures the barrel in place; it is often located at the rear of the front sight block. Additionally, you can check for any signs of welding or soldering, which might indicate the barrel is not easily removable. If you have a gunsmithing tool set, you can also attempt to loosen the barrel nut to see if it is secured by a pin.
ALL of the SKS firearms are carbines. It refers to the barrel length. Standard lenth is 20.5 inches.
You need to leave the barrel 16" or longer to be legal.
@ 1982.
SKS receivers are milled. AK receivers can be stamped or milled.
very carefully... :) Seriously, take it to a gunsmith. The barrel is probably pressed into the receiver and pinned.
Markings.
SN and arsenal markings.
To some extent. The SKS was made by several nations, and a barrel from one nation may not interchange with another nation's. These are not quick change barrels, and DO require special tools to change and properly set them.
yeah if you google pinned and recessed you can find a few forums with people talking about it. it seems to have been in the 80s right before they changed the design.
in Canada they sell for $175 at auctions and gun shows.
100-400 USD
Only if it's pinned and welded, so as to remain a permanent feature of the rifle.