The M16A4; The 3 Round Burst Menace

Published on June 30, 2024
Duration: 31:54

The M16A4, while an iconic and reliable combat rifle, suffers from a flawed three-round burst mechanism that can lead to unpredictable round counts. Its 20-inch barrel offers excellent velocity for effective fragmentation and armor penetration. Despite its limitations for precision shooting, its robust design and high velocity make it a capable platform.

Quick Summary

The M16A4's three-round burst mechanism has a significant flaw: it can 'remember' previous trigger pulls, causing subsequent bursts to fire only one or two rounds instead of three. This unpredictability is a major drawback for the otherwise reliable combat rifle.

Chapters

  1. 00:00Intro Skit & Shooting Montage
  2. 01:33M16A4 Overview & History
  3. 03:21The Flawed Burst Mechanism
  4. 07:50Accuracy Testing (100 Yards)
  5. 13:27Evolution: M16A2 to M16A4
  6. 17:09Ballistics & 20-Inch Barrel Advantage
  7. 20:09Rail Systems & Optics
  8. 23:27Final Assessment & Reliability

Frequently Asked Questions

What is the main drawback of the M16A4's three-round burst mechanism?

The M16A4's three-round burst mechanism suffers from a 'memory' issue. If the trigger is released mid-burst or fired in semi-auto, the next burst may only fire one or two rounds instead of the full three, making it unpredictable.

How accurate is the M16A4 rifle?

Accuracy testing showed the FN M16A4 achieved groups between 1.7 and 4 MOA at 100 yards using 77-grain ammunition. This indicates it's designed as a combat rifle rather than a precision marksman platform.

Why is the M16A4's 20-inch barrel significant?

The 20-inch barrel provides a significant advantage in muzzle velocity, exceeding 3,000 FPS. This allows standard 5.56 NATO rounds to fragment effectively and defeat armor at ranges where shorter barrels might not.

What key changes were made from the M16A2 to the M16A4?

The M16A4 was developed to better accommodate optics and lasers. Key changes include the removal of the fixed carry handle for a flat-top receiver and the addition of the Knight's Armament M5 RAS rail system.

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