Why no 90's guns?

They had the 80's rule for long yet they added Holo sight from 90's, we could get things like Saiga-12, colt M4 and other stuff

https://preview.redd.it/j3eum8geg7ce1.png?width=900&format=png&auto=webp&s=20622ada631d51da446b4a3026a21608753c72a1

https://preview.redd.it/rf75pouqf7ce1.png?width=550&format=png&auto=webp&s=def35d39e325b4c7937d80fbc9ae3266bbc92a2a

https://preview.redd.it/502w0shuf7ce1.png?width=1280&format=png&auto=webp&s=d23fe77aed7ab35aaaf3ffcf1d58e6bcec38a693

https://preview.redd.it/nl1zbcpwf7ce1.png?width=800&format=png&auto=webp&s=eef5697d6bcf7e70006f7dd8f8f708342b81f70d