This should deal with most of the remaining issues as far ground units go. Next and last post will deal with the air units, plus whatever item I overlooked.
Weapon n. 7: AKM it could be renamed AK-74
The north koreans have mass produced a copy of the AK-74. The units currently using weapon n. 7 would be the ones likely to be issued it in real life too.
Weapon n.124 from the Russian OOB 40mm GP-25 GL grenade launcher could be added.
Unit 443: Para Lt Inf Sqd
AKSU-74 SMG in slot 4 replaced by GP-25 GL
Unit 442
1) AKSU-74 SMG in slot 4 replaced by weapon n.18 RPG-7
2) PKM LMG in slot 2 replaced by weapon n. 14 5.45mm RPK SAW
Units 450-451: Para Scouts
I would suggest the LMGs in slot 2 to be replaced with weapon n.1Sniper rifle as it would be a more suitable weapon for a recon team.
Formation 126 and 130 Red Guard
Initial availability date changed to 1/1959. The organization was founded that year.
Source: “Communism in Korea” Robert A. Scalapino, Chong-Sik Lee
Unit 394: Red Guards
1) Weapon 11 7.62mm RPD LMG added in slot 4
2) Initial availability date changed to 1/1990
Unit 393: Red Guards
1) AK-47 in slot 1 replaced by weapon n. 4 SKS Carbine
2) Weapon 10 7.62mm DPM LMG added in slot 4
3) Initial availability date changed to 1/1980
Unit 375 Amphibian Infantry
1)Weapon n. 13 7.62mm PKM LMG in slot 2 replaced by weapon n.14 5.45mm RPK SAW
2)Weapon n. 13 7.62mm PKM LMG in slot 3 replaced by GP-25 GL
Unit 239 GAZ Jeep from OOB 11 might be added, for flavor
The MRL variant of the VTT-323 could be added. It could be created in the following manner.
1)Create a clone of unit n. 105 Type 85 Susang
2) Class changed to n. 137 SP Rocket Launcher
3)Weapon n.203 107mm Rocket added in slots 2 and 3, 18 HE rounds per slot (one load + one reload)
4)Name changed to VTT 107mm MRL or something similar.
Unit n.105 Type 85 Susang icon could be then changed to n. 3428, as slighty more suitable for the ATGM carrier. It would also help to distinguish from the MRL variant.