Reply to your Question is NO, because these systems are one of the most complex system in the defense industry,
Assault Rifles cannot have advance technologies involving complex electronics and system, and that what makes it difficult to design. Assaults Rifles have to be crude yet effective, that is why technology used in fifty's in rifle are still successful one because that era was of crude, reliable and rugged design, not involving complex matrix.
What most people don't understand that any rifle design has to be knockdown, that means each part of rifle should get separated without using any tools for its easy handling and maintenance, so good looking rifles are sometimes tough to clean and maintain so please don't judge rifle by its look.
Rifle quality depends upon its metallurgy which is again a complex science, every country has different weather and so is the level of reaction of Rifle's metal in different places, In simple words a rifle which is great in cold Serbia could be a junk in Iraq. And India which has a diverse areas with different weather, its tough to design an all weather rifle.
Another quality Rifle is judged by is range and caliber, with range of most assault rifles more or less same I would jump to Calibres, I think its really not important to have multi-calibre rifles, Tavors are multi- calibre rifles but I dont know a single incident where Security forces has intended to change the calibre of rifle for any operation, because its of no use.
There are many more factors, but I have quoted the most basic ones up here. May be senior members could add up more.
