I think the best replacement cartridge for the 5.56, is the Remington 6.8mm SPC. Better ballistic in all cases, than the 5.56 NATO. You can easily adapt the upper receiver on all AR-15 type rifles and carbines. 28 rounds can be carried in virtually the same magazine as the current standard 30-rnd. I also understand it has SUPERIOR stopping power than the 7.62 NATO, within 300m.
I can say from shooting 5 rounds with a friend's AR back in March, the recoil is only moderately worse than the 5.56.
I take what n0e says way too seriously
9th April 2005
FatJoe;4378261 I'd like to see a H&K version of an AK47!
there is one, its called the STG44. thats not to say they have anything mechanically to do with each other.