With the terrorists actually outnumbering the enemies we faced in WWII, I must agree. (1.5 Billion Muslims X 15% ready to rumble on world-wide jihad). The "Moderate Muslim" argument makes about as much sense as the "Good Germans" argument in WWII! The "Moderate Muslim" supports the jihad just as much as a "Good German" working in the Krupp Works, or buying German War Bonds.
But when it comes to weapons, our procurement people seem just as hide-bound as the stodgiest Civil War thinkers, who stuck with muzzle-loaders when the 7-shot Spencer Rifle was readily available. Our Pentagoners are stuck on 5.56.
Our Pentagoners are stuck on back room payoffs!!!
And even after the Civil War modified rifled muskets to be breech loaders instead of going with the Spencer.
If history is any guide someone will decide to use parts from the M4s the have on hand to make basically an M4 that uses the .243 Winchester to save money. Then they'll change powder in the .243 and start another round of modifications to compensate for the powder change.