The first real North Korean 170-mm M1989 Koksan self-propelled guns were recorded by eyewitnesses on one of the military trains in Russia. There is little information about the M-1989 Koksan self-propelled guns; they were created in the 1970s on the chassis of T-54, T-62 or Type 59 tanks. With a 170-mm gun, more than 58 calibers long, the M1989 DPRK self-propelled gun can fire shells at a range of up to 40 km, and active-rocket projectiles at a range of up to 60 km.