(Editor's note: On April 21, the Army announced it had awarded Sig Sauer a $4.5 billion firm-fixed-price contract "for the manufacture and delivery of the XM5 Next Generation Squad Weapon Rifle, the XM250 NGSW Automatic Rifle and the 6.8 Common Cartridge Family of Ammunition, as well as accessories, spares and contractor support.") The Army's ability to produce its first new caliber of small arms ammunition in more than half a century will determine how it fields the Next Generation...