Big E, hate to disagree with you, but...
I'm an Armor Officer, served in tanks, Cav, and as an Advisor, and have been assigned an M-4 in all of the above roles. Despite what might be said in some circles the M-4 is not a spec ops weapon. While initially deployed within the Special Operations community, the M-4 now serves across the US Army, I've seen MP's, tankers, Infantrymen, and others assigned it as a primary weapon.
As for picking the M-4 it's a good decision, the weapon is light, well balanced and since the development of rail systems it has incredible versatility, capable of mounting gun lights, optics, lasers, and other devices to improve it's effectiveness. Additionally it's common heritage with the M-16 means less spare parts to stock, simplifying logistics.