Jpjeeper, hate to say it but you got sucked into buying a bunch of stuff that won't work on your SKS.
With a couple model exceptions, the SKS was never designed to use detatchable magazines. Nor does it have a decent base to mount a scope. People try and 'tacticool' their SKS's only to find it's much harder to do so than they initially thought.
If you want to 'accessorize' a 7.62x39 rifle, sell the SKS and get something like an AK or Saiga. I did, haven't looked back.
BTW if you have a Yugo SKS and it's not ejecting the handfed round, your gas valve may be the culprit. Either it's in the 'off' position for single shot firing or it's corroded, a common problem.