I've take the MG off the tripod for disassembly
Above the grip is the recoil pin protrudeing from the rear of the action.
Press the recoil pin in and lock it in place with a quarter turn.
Let the bolt go forward and lift the feed cover. The plate holding the pistol grip now slides up.
Pull the bolt back and remove the cocking handle.
Remove the bolt from the action.
Disassembled
Close-up of the bolt.