Here's a picture I took of the gas valve and piston in my new-to-me Yugo SKS. They can't possibly be the original parts, can they? I got the gun from a distributor, and although there's hardly a sign of cosmoline, the gun was pretty filthy with old grease, grime and powder residue (The trigger group being the most caked). I thought it odd to find 2 brand new stainless parts in a 40something year old milsurp bought from a distributor. I had already ordered a replacement valve, looks like I won't need it! Also, although the takedown instructions on "surplusrifles.com" do not show the front stock retainer (pinned to the barrel) having to be removed to separate the action from the stock, my centerfire rifle takedown book does. I drifted out the cross pin, PB blasted, and heated it up a little and it still wouldn't budge. If I can't get it to move, do I have to remove the recoil lug assembly to get the action off the stock? If so, F that. I'll leave it together. Sorry mods, my SKS-related threads keep getting moved!! I thought this one fell under "firearms"