From an engineering point of view I'm kinda sceptical with bullpup because of the huge distance between trigger and chamber as well as the latter being behind the first. Needs a lot mechanical effort to bridge that gap and that opens up for failure. Also having a catastrophic failure happen in your face might be unpleasant.
ya whenever you have to make things more complicated to work the room for error increases, but alot of countries are converting to these style of weapons for some reason, must be good or else they wouldn't have done it. Surprised we as a nation(U.S) havent decided its time to upgrade, idk maybe they dont see anything wrong with the current, M4 that would need upgraded.
Bullup designed weapons tend to be bullet hoses, because you want to use them from up close anyway.
ya these are built with the intention of leaving a 16-18inch barrel though, while giving the person the length of a weapon imitating a 12-14 inch barrel, so its dramatically smaller, which allows for better handling in room clearing and close quarters stuff, while not sacrificing the ability to fight from afar if need be.
Iran's new Battle Rifle, the Kh-2002
China's Battle Rifle, the QBZ-95
South Africa's Battle Rifle, the Vektor CR-21
Singapore's Battle Rifle, the SAR 21