Top 10 Things You Didn't Know About The AR15 M4 / M16 Rifle

Published on January 29, 2021
Duration: 4:47

This video explores 10 lesser-known facts about the M4A1 rifle, focusing on its military variants. It details the lineage from early CAR-15 models, discusses parts interchangeability with the M16, highlights Special Operations Command modifications (SOPMOD), and touches on the legalities of civilian ownership of full-auto variants. The information is presented by a channel focused on firearms.

Quick Summary

The M4A1 rifle is a shorter, lighter version of the M16, firing 5.56 NATO. Early variants like the CAR-15 had issues with accuracy and muzzle flash. While 80% of parts are interchangeable with the M16, key differences affect recoil. Civilian ownership of post-1986 full-auto M4s is illegal.

Chapters

  1. 00:21Introduction: M4A1 Rifle Overview
  2. 00:49Fact 1: Early M16 Carbine Variants (CAR-15/XM177)
  3. 01:10Fact 2: CAR-15 Meaning & Colt's Strategy
  4. 01:23Fact 3: CAR-15 Colt Commando Variants
  5. 01:33Fact 4: CAR-15 605B & First Burst Option
  6. 01:51Fact 5: M4A1 vs. M16 Parts Interchangeability
  7. 02:16Fact 6: SOPMOD Modifications for M4A1
  8. 02:45Fact 7: M4A1 Manufacturers Worldwide
  9. 03:06Fact 8: 'M4' Trademark Legal Battle
  10. 03:24Fact 9: Global Military Adoption of M4
  11. 03:32Fact 10: Civilian Ownership of Full-Auto M4
  12. 04:15Conclusion & Channel Information

Frequently Asked Questions

What is the primary difference between the M4A1 and the M16 rifle?

The M4A1 is a shorter and lighter variant of the M16 rifle. While approximately 80% of their parts are interchangeable, crucial components like the buffer spring, weight, barrel, and gas tube differ, leading to distinct recoil characteristics and handling.

What were the early carbine versions of the M16 rifle called?

Early carbine versions of the M16 were designated as the CAR-15 or XM177. These models often featured shorter barrels, around 10.5 inches, but were known for issues with accuracy and significant muzzle flash.

Can civilians legally own a fully automatic M4 rifle?

No, it is generally illegal for civilians to own a fully automatic M4 rifle manufactured after May 9, 1986, due to federal law. However, pre-1986 registered machine guns are transferable, and legally owned pre-1986 M16 lower receivers can be configured with M4 uppers.

What does SOPMOD stand for in relation to the M4A1?

SOPMOD stands for Special Operations Peculiar Modifications. This program involved enhancing the M4A1 with specific accessories like Knight's Armament handguards and rails, an M203 grenade launcher, suppressors, and advanced optics to meet special operations requirements.

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