I'm really not impressed at the level of knowledge about firearms in this thread. Almost all of you seem to have extremely limited knowledge on the subject, and even those of you with some demonstrated knowledge seem to have gaps in your knowledge that would lead to tactical failure.
ThisTypeofThinking said:
Clearly not many people know much about guns here. As with say, a longboard, there is no such thing as the "best" assault rifle. Picking an assault rifle is entirely dependent on the current situation and personal taste. Me and my friend have discussions about this fairly often, he prefers the M4, and similar weapons, which allow for lighter rounds, hence the ability to carry more with you, as well as general advantages of a 5.56mm round. I on the other hand prefer battle rifle style weapons such as the M14. I don't feel confident shooting at the enemy with a glorified .22. In my opinion, the best era of war was WWII, where they cared less about the little features of weapons, which really don't matter, and more on knocking for the enemy with one shot. I also appreciate the ability to reach out further than most 5.56mm weapons can and still inflict some damage.
With that said, as mentioned above, I really don't like assault rifles, since they compromise range and power for rate of fire and ammo capacity. So I'd say an M14 with a EBR stock. I really wish everyone would shut up about the Tar/Tavor, since it is pretty much the Halo of assault rifles, it has brought nothing new to the table, but everyone still seems to love it for some unknown reason. Bullpups are supremely overrated. The SA80 blew so bad, that the brits needed HK to fix the entire design so it didn't jam more than a 'nam M16. If I have to choose and assault rifle, however, it's going to be some variation of a G36 in 6.5mm Grendel.
I wouldn't exactly trust you to outfit an army in the field. You sound like one of those old Bisley School nutcases, for whom accuracy and marksmanship was everything. We never hear about the rifles that they designed any more; the World War I and World War II weapons we hear about are the ones which compromised on accuracy for superior battlefield reliability and performance. The Ross rifle never displaced the compromised but ultimately superior Lee-Enfield, and there's a reason why they don't outfit Walther WA2000s to battlefield snipers.
There are plenty of good reasons why the 5.56x45mm NATO cartridge replaced the full-power 7.62x51mm NATO round, and one of the most important is the weight factor. Both the rifle and ammunition for a 5.56mm-calibre weapon is considerably lighter than that for a 7.62mm weapon, which allows a soldier to carry more ammunition, which is useful. You seem to be forgetting the utility of suppressive fire, which is what most fire under a fire-and-manoeuvre drill amounts to, and having more ammunition for that suppressive fire allows the soldiers to present more of a threat than they would with heavier rifles with less ammunition. The weight factor helps a lot when it comes to fighting in close quarters as well; if you're trying to make your way through streets and houses, I bet you'd rather want a smaller, less awkward weapon over a full-sized battle rifle. That's where the 5.56mm calibre comes in handy.
As for bullpup weapons, the unreliability of the L85A1 and L86A1 is not indicative of most bullpup weapons. Indeed, the unreliability of both weapons is more a case of them being designed by committee, as it were, and they'd originally been designed for a smaller-calibre round to boot (4.85x49mm). British involvement with bullpup weapons stretches back further than the 1980s, as in the late 1940s and early 1950s, the British Army designed the EM-1 and EM-2 bullpup weapons, firing the .280 British intermediate cartridge. These weapons were designed very well, unlike the later L85 and L86 weapons, but their adoption was halted when it transpired that America wanted a heavier cartridge, the 7.62x51mm round. Of course, the Americans decided that the round was too powerful, and promptly adopted a smaller round than the .280 British round which probably would have worked the way they wanted the 7.62mm round to work.
The 1980s SA80 project took little from the previous EM-2 rifle, apart from its bullpup layout; its internals are more reminiscent of the Armalite AR-18, and there are rumours that the Royal Small Arms Factory basically nicked the design from the AR-18 and failed to copy it correctly [http://www.guardian.co.uk/uk/2002/oct/10/military.jamesmeek], because the AR-18 is known as a simple, cheap weapon design using cheap pressed-steel parts. (Actually, there's another connection in there that the British Army must not appreciate - it's the AR-18 that the IRA are most associated with, because of its simplicity.) Interestingly, the L85A1 seems to be another victim of Bisley School thinking, because it's an accurate weapon with appalling reliability.
Other examples of bullpup weapons, including the FAMAS and the Steyr AUG, are known for good reliability and robustness, and hold to that one great advantage of bullpup weapons: they're less awkward in close quarters, such as MOUT fighting and inside APCs and helicopters as part of mechanised warfare. So, perhaps you should have a look at your own considerations in this subject before criticising other people's knowledge, OK?