Another option might be the Golani/Galil Sporters. Used to not care for them for irrelevant, personal reasons, but this is a legit, user friendly final evolution of the Kalashnikov. It uses it's own mags, which are 35 rd. to the good, but costly or rust coated in recent examples. I got A WASR last fall and liked it for what it was, but the side lever firecontrol/safety is for the birds if you've ever operated an AR. The pre-94 (or 89) originals are big money exotics. Now prices have come down. Even coming from Century this is no stamped, beater AK. IIRC there was a mag adapter to take AR-15 mags*.
.223's esp. the European types were always my favorite type of guns, where I'd blow my first wad if I won the lottery. Saw an ad in SGN for US recievers, compliance parts, and original stuff for Beretta AR-70's, no complete guns yet to my knowledge. It's just cool to me to see stuff like this around again, right in the face of M4 dominance. Would be tempted to snap one of those Galil's myself in due time but they tape out at 29.5" folded, and here in the Wolverine state that means a half inch shy, requires a handgun permit, and I'll be damned to register a long gun.
The M-17 is good if you ever see one, too bad they went OOP. If they brought it back, with a left side charger and just a rail on top (and elsewhere) would make an excellent carbine, giving a full 20" to make any load effective, but still just 30" OAL. People just don't like bullpups I guess.
*off the top of my head, rifles that take AR Mags (old, new, military only):
All AR's (incl. pistols, OA's, ZM, Carbon 15, etc., duh), SU-16s, new Rem. police pump, Bushmaster rifle and armpistol, Daewoo's, Australian Arms/Leader SAR and SAP, AR-180's, Stoner 63 and Robinson M-96 and XCR, Sig 556, Bush. M-17S, the "Crossfire" 12g/223, new FN Bullpup, new Beretta (and of course the OICW and SCAR projects, I think the Famas and L85A1 or whatever English bullpup)
w/adapter-AUG, Galils
no go-HK93, FNC, AR-70, AK's and Valmets, Mini 14, Sigs,