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

Published on January 30, 2021
Duration: 4:32

This video explores ten lesser-known facts about the M4A1 rifle, tracing its lineage from early CAR-15 variants to its modern military applications. It highlights key differences between the M4A1 and M16, discusses the development of specialized SOPMOD kits, and clarifies legal ownership restrictions for fully automatic firearms in the US.

Quick Summary

The M4A1 rifle is a military carbine, a shorter and lighter version of the M16A2, chambered in 5.56 NATO. It operates via direct impingement gas system and is magazine-fed, designed for military applications allowing for three-round burst or full-auto fire. Early variants like the CAR-15 had issues with accuracy and muzzle flash.

Chapters

  1. 00:21Introduction to M4A1 Rifle
  2. 00:50Fact 1: Early CAR-15 Carbine Variants
  3. 01:10Fact 2: CAR-15 Meaning and Colt's Strategy
  4. 01:23Fact 3: Colt Commando Variants
  5. 01:33Fact 4: CAR-15 605B - First Burst Option
  6. 01:51Fact 5: M4A1 vs. M16 Parts Interchangeability
  7. 02:15Fact 6: SOPMOD Kit Development
  8. 02:45Fact 7: M4A1 Manufacturers Worldwide
  9. 03:06Fact 8: Colt's M4 Trademark Lawsuit
  10. 03:25Fact 9: Global Military Adoption
  11. 03:32Fact 10: Civilian Ownership of Full-Auto M4s
  12. 04:10Conclusion and Recap

Frequently Asked Questions

What is the M4A1 rifle?

The M4A1 is a military carbine, a shorter and lighter version of the M16A2, chambered in 5.56 NATO. It operates via direct impingement gas system and is magazine-fed, designed for military applications allowing for three-round burst or full-auto fire.

What were the early carbine versions of the M16?

Early carbine models of the M16 were designated CAR-15 or XM-177. These had a 10.5-inch barrel but were known for poor accuracy and significant muzzle flashes, leading to further development.

Are M4A1 and M16 parts interchangeable?

Approximately 80% of M4A1 parts are interchangeable with the M16. However, key components like the buffer spring, barrel, and gas tube differ, which significantly affects the M16's smoother recoil and controllability.

Can civilians own a fully automatic M4 rifle?

Civilians cannot legally own a fully automatic M4 rifle manufactured after May 9, 1986, due to federal law. However, pre-1986 fully automatic M4s or legally registered M16A1 lowers with M4 uppers can be owned.

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