These are a few weapons that i found present in Sweden in the 80s, Post some of your own in the comments!
KSP 58/FN MAG - General Purpose Machine Gun
KSP 90/FN MINIMIN - Light Machine Gun
KSP 95/PK - Squad automatic weapon
KSP M94/MG 3 - General Purpose Machine Gun
M203 - Under Barrel Grenade launcher
RBS 69/FIM 43 - Portable Air Defense
Pistol M40/Lahti L 35 - Semi Automatic Pistol
Thanks for reading, post your own ideas below, Thanks!