Bullpups are one of those ideas that seems great on paper, yet falls far short in reality. When tested and measured for accuracy, speed, handling, manipulations- pretty much every aspect that matters for a practical/combat carbine, they pale in comparison to the M16/M4 family of weapons. Their sole "benefit" is reduced overall length with a longer barrel for higher velocity. Yet not only is that not always a good thing when trying to hit targets, it is no longer a problem.
There is ammo available that will expand/fragment in excess of 400m from a 10.5in barrel. Anyone issued 10.5's in the military have at least two types and civilians have no such problems.
The balance of bullpups are only in carrying them. They suck for shooting. There is a reason (or lots and lots of reasons) that every single unit/organization that has a choice, chooses an M4 based weapon. Even in countries that issue bullpups- the "special" units use M4's or a variation thereof.
