While most likely at least some of these ideas are already by considered by the devs for addition into the game, or even are not even being considered, might as well write up some ideas.
Some cloth assets:
Some Balaclavas:
https://m.media-amazon.com/images/I/511INo4i2GL._AC_UX569_.jpg
https://img.ltwebstatic.com/images3_pi/2021/07/12/162605867916f78f6baac31b25949b666b81f5f621_thumbnail_600x.webp
https://www.ubuy.co.it/productimg/?image=aHR0cHM6Ly9tLm1lZGlhLWFtYXpvbi5jb20vaW1hZ2VzL0kvODErSTRLazAwdUwuX0FDX1VMMTUwMF8uanBn.jpg
Soviet Pilotka:
https://m.media-amazon.com/images/I/31j+AkYw43L._AC_.jpg
Weapons:
AKS-74u
G3A3 or FAL
Kozlice shotgun, with sawn-off variant
MP5
.44 Revolver
The Czech vz. 58 is another consideration, also apparently there were prototype underbarrel grenade launcher and light support weapons that were never adopted, considering Arma 3 setting a precedent of using prototypes as inspirations, maybe have these IRL unrealised variants available so that the INDFOR/FIA forces have their own specific range of weapons?
Like with my other posts, I will be editing this over time with new ideas as I think them