Ahh. One of the big arguments among the small arms community, one that has no beginning and no end and is kept endlessly alive by pints of beer and shots of whiskey. The M16/M4 US issue rifle. Love it? Hate it? Is it any good? Is it reliable? Does it kill people or just piss them off? Obviously, this is two questions – one about the platform, the rifle itself, in all its various guises and configurations, and the other about the little 5.56mm round.

To skip to the end of the story first, I think your children are going to be issued some M16 derivative chambered in 5.56 when they join up. It’s a classic problem you see constantly in the tech world, an unbeatable combination of “good enough” and a massive installed base. Yep. The M16/M4 in 5.56 is Microsoft Windows.

Setting aside for now that fact that dusty, arid environments coupled with high winds and/or helicopters are the worst possible environments for firearm reliability, I think the current M16/M4s are reliable enough, even if you can’t treat them like an AK. If you take appropriate care of it, use quality ammunition and healthy magazines you’ll be ok.

Which leaves us with that pesky 5.56 round. Never has a tiny bit of metal and chemical propellant caused so much Sturm und Drang. And while, again, in this case it’s difficult to see a practical path to institutional change, I definitely come down in the hater’s camp. Given my druthers in a fight, I want to be putting .308s downrange. On the other hand, I’d want plenty of rounds in a fight, and if I had to hump my gear, weapons, water and food all day over all sorts of terrain, more 5.56s look a lot more appealing than fewer 7.62s, even if the latter are significantly more effective. Which isn’t even considering that if I walked into an ambush to start that fight, I’d want to run through at least a couple magazines on full auto, something not recommended with the full power rounds, even if it is a select-fire rifle. So ultimately, I think going to an intermediate power cartridge was a good decision.

But here’s the thing. .223 is derived from varmint rounds. But a man is 200 pounds, more deer than woodchuck or prairie dog. And while I know a lot of people who hunt deer with a .22-250 (my dad, for one notorious example), it would have made a lot more sense to develop a military intermediate rifle round from one of the 7mm class rounds so popular with deer hunters. In other words, .270 Winchester. You still get smaller, lighter rounds that would be controllable on full auto, but you get twice the bullet weight at equivalent velocities, with dependable terminal ballistics and penetration out over 300 meters. And one very good thing you might end up with is the 6.8 Remington, which is impressive in every way the 5.56 is not.

So there you have it. In a perfect world, we keep the M16/M4 design, but chamber it in 6.8 Rem. I know, I know, everybody disagrees. With me and with each other. Individually and collectively. You like the 6.5 Grendel. You HATE the M4. Big rounds. Little rounds. It never ends. If it did, what would we find to argue about? Now, don’t even get me started on defensive handgun calibers…