How to Remove an SKS Stock (10 Steps)

Flip the switch on the right side of the rifle to a vertical position and pull the pin outward.
Remove the receiver cover and buffer assembly by gently pulling backward.
Pull the charging handle back to remove both the bolt assembly and the charging handle.
Turn the rifle upside down and set it on a smooth surface.
Use a Phillips screwdriver to press down the button behind the trigger loop. This will cause the trigger assembly to pop up. Be careful: The trigger assembly is spring-loaded.
Turn the rifle over and lift the barrel assembly out of the stock.
Flip the lever in front of the rear-sight post to release the gas tube assembly.
Remove the gas piston.
Using a small nail or hole punch, push the retaining pin out of the back of the rear metal cover of the handguard.
Remove the wooden handguard. You can now attach the new stock.

How to Remove a Magpul M4 Stock (3 Steps)

Fully extend the stock and depress the release latch. Pull the stock back to fully extend it along the gun's receiver extension.
Locate the stock-release pin. The release pin is located on the left side of the stock. The pin is under the main arm of the stock, just in front of the release latch used to adjust the stock length.
Pull down the release pin and remove the stock. Pull the pin down as far as it will go. The stock will slide off of the M4 receiver extension.