M14 vs M16 | Which Is Better?

From M14 to M16 in the Vietnam War

The video opens by framing the U.S. decision, in the middle of a large-scale war, to replace the M14 with the then-new M16 as the standard service rifle. The host focuses on the Vietnam War and the American side of the conflict, asking whether the M16 truly outperformed the M14 or if the older rifle simply failed in that environment. The M14 is introduced as the rifle that kicked off the war for U.S. forces, while the M16 became its replacement. The discussion sets up a practical comparison by shooting both rifles to evaluate pros and cons, rather than relying solely on reputation or nostalgia for the “glorious” wood-stocked battle rifle.

Design, calibers, and battlefield roles

The M14 is described as a 7.62 NATO battle rifle that many shooters enjoy, and it is noted for its continued ceremonial and limited service use. It holds a paradoxical place in U.S. history, having one of the shortest official service lives as a standard-issue rifle while also remaining in service in various roles for a long time. The M16 family is presented in a similar way: the M16A1 itself was not in front-line service for long, but the broader M16 platform, including the M16A4 and derivatives like the short Mark 18 and DMR-style Mark 12, remains relevant. The M14’s 7.62 NATO chambering suits medium to longer-range engagements, while the 5.56×45 M16 favors lighter weight and higher ammunition capacity. Standard barrel lengths of roughly 22 inches for the M14 and 20 inches for the M16 are mentioned, along with shorter SOCOM and scout-style M14 variants for more compact use.

Operating systems and maintenance demands

The reasons for the M14’s rapid phase-out in Vietnam are tied to climate and materials. Its wood stock performed poorly in the jungle, absorbing moisture, warping, and interfering with the metal components, which led to reliability problems. A fiberglass stock was eventually introduced as a fix, but by then the M16 had already begun to appear on the battlefield. The M16 brought a lighter package with polymer furniture on the stock, grip, and forend, and a more enclosed receiver with a dust cover intended to keep debris out. The M14’s receiver area is more open, allowing dirt in but also making it easier to shake out. Mechanically, the M14 uses a short-stroke piston system with a separate piston and operating rod driving the bolt, while the M16 routes gas from the barrel through an integrated front sight gas block and gas tube directly into the upper receiver to cycle the bolt carrier group. This direct impingement system is simpler but runs dirtier, requiring more frequent cleaning.

Troop experiences and rifle preferences

The video notes that the M16’s lighter weight and smaller 5.56 cartridge allowed troops to carry more ammunition, but the round lacked the power of 7.62 NATO. The direct impingement system also caused the rifle to foul quickly, so soldiers had to stay on top of maintenance. Field-stripping an M16 is not difficult, but it involves smaller, more delicate parts such as the firing pin retaining pin, which can be troublesome to manage in tall grass and jungle conditions. By contrast, the M14 uses larger components and can be disassembled without tools by pulling the trigger guard and separating the barreled action from the stock, then removing the piston, charging handle, and bolt for cleaning. A Vietnam veteran’s account is mentioned: he trained with the M14 at Parris Island but was issued an M16 when he arrived in Vietnam. As a smaller radio operator, he preferred the lighter M16 over the heavier M14 or carrying dual 1911 pistols. The AK-47 is briefly acknowledged as arguably the most effective rifle of the war, though the focus remains on U.S. service rifles.

M14 ergonomics and controls

Attention shifts to how the M14 handles. Ergonomically, it offers little ambidextrous functionality beyond the safety and magazine release. The safety is located inside the trigger guard and is pushed forward to fire, a placement some consider questionable but manageable with proper handling. The magazine release is a catch behind the magazine, similar in concept to an AK-style release. To chamber a round or send the bolt home, the shooter simply pulls back on the right-side charging handle. The host notes that, while the M14’s controls are straightforward, the later M16 design ultimately allows for faster manipulation. However, the M14’s charging handle position makes certain reload techniques efficient, such as using the support-hand thumb to sweep the handle back when the bolt locks open, enabling a quick return to firing.

M14 recoil, accuracy, and rapid fire

On the range, the M14 is fired at an Infinite Defense target at about 20 yards to evaluate felt recoil and controllability with 7.62 NATO. An initial string of roughly 10 rounds at a moderate pace feels good, and a follow-up string at a faster pace keeps most shots within a central rectangle on the target, though a few rounds land outside the intended center-mass zone. The shooter then performs a reload, emphasizing how natural and efficient the M14’s charging handle makes rapid reloads look and feel. A full 20-round magazine is then fired as quickly as possible while trying to stay in the center rectangle. All 20 shots land on target, with two outside the B-zone and about seven in the A-zone where the shooter was aiming. The results illustrate that, despite heavier recoil, the M14 can be run quickly with acceptable accuracy at close range before transitioning to a comparison with the M16.