I hate to beat a subject to death, but why not repeal the stupid gun control laws, and let the garage machinists come up with the innovative designs they always have served our country with. If their ideas aren't wholly accepted, many times parts of their ideas are. My gripe about many modern weapon systems are that they are uncomfortable to carry. My M16 was moderately comfortable, but an AK sucks to lug around. IMHO the M1 Carbine was the best carry weapon, and second would be the Garand. The carbine was weak, but I'd like to see some work on the garand concept. Steel and wood are nice, but with all the new manufacturing techniques and newer metalurgy, seems like we could bring the concept back. The M14 was a failure due to good intentions. They didn't improve on the Garand, they just modified it and made it heavier. You sometimes can committee a great design into a POS. I dunno. I just feel confident in the big ol'e hunka steel. The 5.56 is just a mite weak. Even with good hits, the soon to be departed don't usually go down like they do with 7.62. I like the dead to stay dead.
As for Ma Duece, what's to improve? That's a mighty formidable foe. I love the M2, and so do most guys when their getting attacked by a hind D!