I just picked up a matching, "triangle 0223" arsenal SKS. The bayonet has been removed (I have the original and will be re-installing it), and a pinned-on muzzle brake.
The brake appears to have been fitted with a longer pin tapped through the front sight base.
From what I can tell, all I need to do is drive out the longer ping, remove the brake, cut the pin to the correct shorter length and then re-install it.
Am I missing anything here, or is it really going to be that simple?
I'm not sure if the seller has the original cleaning rod, I may need to pick one of those up online.