>>94145This is a Norinco MAK90 from China, it's just the semi-auto version of the Type-56 assault rifle (China's unlicensed and reverse engineered clone of the AK), with a plain muzzle, no bayonet lug, and with the stock and pistolgrip replaced for a thumbhole stock, making it legal to import.
The MAK90 came in a number of configurations, some receivers were machined from billets, some were stamped like later AKMs, some had a completely straight rear on the receiver (which made converting these for normal stocks a breeze), some had a typical Chinese slant on the rear (still doable, just need to get the right stock), while some had an aggressive slant on it, which makes conversions less simple. Doable, but usually involves an adapter (unless you want to have a bunch of gunsmithing done), which doesn't look great.
Aside from the classic 7.62x39mm, these were also available in 5.56x45mm, which is fine, they work like they should, but while the 7.62mm one takes any normal AK magazine, the 5.56mm one takes Norinco's own magazine, which today are uncommon and usually fetch $100 each.
There was never any Warsaw Pact 5.56x45mm AK (rather, these usually were from NATO countries or post-Soviet states), so there was no international standardization like with 7.62x39mm and 5.45x39mm AKs, thus there's quite a few different standards of 5.56mm AK magazines, which generally do not interchange.
Usually MAK90s go for about $800, which isn't terrible when you consider that far less well made WASR AKs via Century International Arms have been hiked up to these levels by now.