Marine 3/C Practice Test 2026 - Free Marine Practice Questions and Study Guide

Think about what enables Marines to lay down continuous, high-fire for targets at longer distances. A 7.62mm, belt-fed machine gun is built for sustained fire and extended range, which is exactly what long-range engagements demand. The M4 is a compact 5.56mm carbine designed for maneuverability and closer ranges, not long-range, sustained fire. The M249 SAW can provide automatic fire, but it uses lighter ammunition and has a shorter effective range and less sustained capability than a 7.62mm setup. The M240B uses 7.62x51mm ammo, is belt-fed, and is specifically designed for continuous, high-rate fire over longer distances, often mounted on a tripod for stable, suppressive fire. That combination makes it the best fit for engaging distant targets with sustained fire.