US Army Unveils 'Revolutionary' $35,000 Rifle
rbrander writes "Don't call it a 'rifle,' call it the 'XM25 Counter Defilade Target Engagement System' and get your $35,000 worth. Much more than a projector of high-speed lead, this device hurls small grenades that automatically detonate in mid-flight with 1-meter accuracy over nearly 800m. The vital field feature is the ability to explode 1m behind the wall you just lazed — the one with the enemy hiding behind it."
If you study guns, you'll notice that the most reliable ones fire larger, heavier, rounds and themselves are larger and heavier. Good reasons for this:
1) The tolerances don't have to be as tight. When things are large, there's more room for play. A bit of dirt doesn't matter nearly so much.
2) More recoil force and/or gas. When there's more pushing back against the action, it cycles better. Also you can load up heavier springs, to push it back harder, again making it more reliable.
That's what the M2 is still one of the most reliable guns out there. Shoots a big heavy round and is built with some room for error in it.
Wonderful, but you have to consider carried weight. Troops have to slug a lot around, gun and ammo weight matters. While it might sound nice to say "Just give them bigger guns with bigger ammo!" that isn't necessarily so practical.
Accuracy also comes in to play. Part of the AK's reliability comes form the action. If you've ever watched it in slow motion it positively slams shut, even flexing and vibrating a little. Well enough but at what cost? The cost is accuracy. It is not a good gun at range. "Spray and pray," are very much the operative words. The M4/M16, however, are much better. They aren't quite rifle accurate, but they aren't bad.
It is a tradeoff, and it is easy to pull the "grass is greener" type thing, look at the other gun and say "Well clearly that is better!" However if you used that, well then you might have a different opinion.