You have to have 10 or LESS foreign parts. Your SKS has a total of 15 foreign parts, so you need to replace 5 of them. By my count, from what you listed above, you onlyhave swapped out3 withUSA parts: Gas Piston (1) Tapco Stock & Handguard(2&3)you still needtwo more because you can't count the pistol grip because it's not on the listbelow and you just added it so it cancels itself out.

I also made a mistake on my earlier post, I did a little more research and you still cannot get ANY of the fire control group made in the USA for an SKS. Below is a more accurate count of what's available from US manufacturers.

1.Receiver.
2.Barrel.
3.Muzzle attachment.
4.Bolt.
5.Bolt carrier.
6.Gas piston.
7.Trigger housing.
8.Trigger.
9.Hammer.
10.Sear.
11.Disconnector.
12.Buttstock.
13.Forearm/handguard.
14.Magazine body.
15.Follower

As you can see there are only 6 of the 15 components that are available from a US vendor. You will almost have to purchase all of the bold type components in order to make your SKS legal. There is no way around this, you cannot use the original fixed 10 round magazine you must buy a USA made detachable (duckbill) magazine in order to use the body and follower in your parts count. I've never been a fan of those magazines as most of them on the market are absolute junk.

If it were me, I'd leave it as is...nothin wrong with the original stock, little short sure but it makes for a pretty handy little rifle especially in the paratrooper configuration.

Good luck with whatever you decide to do.