The Chinese NDM-86 is manufactured at the Jing-An arsenal number 26 (a P.R.C. Ministry of Public Security manufacturer) and has a military designation of Type-79 (adopted in 1979) or Type-85 depending on which optical sight is used. The rifle is distributed by Norinco Equipment and is sold as both the NDM-86 and EM-351 and is chambered in either the 7.62x54R rimmed cartridge or 7.62x51 NATO caliber. Though the Type-79/85 is still in use in the PRC by special police and military units, it has been replaced by the QBU-88 for general military DMR use.
The rifles first appeared in the US around 1985 and were imported by Navy Arms. These early examples came in a green plywood transit chest which contained the rifle and the metal scope case. There were a very small number of sample rifles imported in the early 1980's that were chambered in .308 Winchester and designated as EM-352. These are not to be mistaken with the the NDM-86 in .308. The difference being that the EM-352 used standard curved magazines but with a modified follower to allow proper feeding of the rimless .308 Win cartridge.
Other importers of NDM-86 rifles were CSI (China Sports Int'l) in Ontario, California; CJA (China Jing-An) in Springfield, Montana; KFS (Kengs Firearms Specialty) in Atlanta, GA; GBE of Los Angeles, CA; and KSI/JPE (King Sport / Jay's Precision Enterprises) in Pomona, California. KSI alone imported 500 NDM-86s (in 7.62x54R) but the total number of NDM-86s in 7.62x54R from all five importers is not known. From data in the NDM-86 registry here there is so far an almost equal number of .308 (7.62x51) caliber versions submitted from owners as the 7.62x54r version. Since it is known there were 1500 NDM-86s in .308 imported it would not be far fetched to say a similar number of 7.62x54r versions came to the US as well.