The NHM 90 is a semi-automatic civilian development of the Russian Kalashnikov AKM and RPK infantry small arm built by Norinco of China and marketed in the U.S. by China Sports Inc. of Ontario, California
The entire reason these guns exist is to get around the provisions of the Clinton gun ban. There isn’t a lot of information on them in the internet, and they are basically just a semi-auto chi-com AK clone. They aren’t bad quality, but I perfer to spend my money on American designed guns.NHM 90 Semi Automatic Instruction Manual
If you are interested, all of these gun documents I am posting can be found on the Firearm Manual Disk I have listed to your left. Additionally to the hundreds of documents I have posted, I have hundreds of gun patents (mostly suppressors) as well as class PowerPoints and targets. all for $5.