The M4A1 is the special operations version of the M4 that's been in use for more than a decade. It features a heavier barrel and a full-auto trigger.

Our M4A1 loadout recommendation in Warzone, including the best M4A1 class set up recommendation and how to unlock the M4A1 explained. Skip to main content 2025 Release Schedule ...

The M4 and M4A1 are designed to be held with a bent front elbow. But many soldiers utilize a technique in which they extend their arm and lock their elbow for better stability.

EXCLUSIVE: A competing rifle outperformed the Army's favored M4A1 carbine in key firings during a competition last year before the service abruptly called off the tests and stuck with its gun ...