I am having a hard time with my NORINCO SKS SPORTER
Guys, the "SKS Sporter" this gentleman has is an authentic Norinco factory AK mag conversion (also called the SKS-M). There is also an SKS-D which is more desirable as it is pre-ban (pre-9.22r, not pre-AWB). See
here for more details.
HillBilly, I believe the Cowboy Companion has a standard fixed mag, but other than that, you are spot on.
Concerning, getting those mags in. Yes, they are a pain to get aligned right. Don't hold them at too sharp an angle. Hold them *almost* straight up and down. You have to get the notch at the front to catch on the receiver, then rock them back just a little to lock. If you hold them at too much of an angle, they will want to catch at the ridge on the mag just below the notch. Do it slowly with the rifle upside down and an empty mag so you can see. Then practice a bit, you'll get the hang of it.
Unfortunately, the Chinese didn't do the best job in the world building these. It's an extremely crude conversion (hard to believe it's actually more crude than an AK). Certainly an interesting collectable, but difficult to get to work. Just the nature of the beast. On the plus side, it's probably more accurate than your average SAR1 or WASR.
They can also be picky about what mags work with it. I can get Hungarian 20s, Romanian 30s and Plastic Waffle mags to work in mine no problem, but I've seen some guys say they can't get any european mags to work at all and can only get Chinese mags to work. It probably varies from rifle to rifle.