Infantry and other combat arms typically carry an M4 with a series of authorized add-ons, including Aimpoint red dot sights, Trijicon ACOG fixed-power rifle scopes, foregrips, laser designators ...

The new rifle would likely replace the M16/M4 platform, which has been in the hands of troops since the 1960s and undergone multiple modifications and upgrades. Maj. Jason Bohannon, lethality ...

Former Gen. Stanley McChrystal, who led the war in Afghanistan, endorsed strong gun control laws Tuesday on Morning Joe. “I spent a career carrying typically either an M16 or an M4 Carbine.