M16A2 Clone Rifles

Published on September 2, 2018
Duration: 23:04

This video provides a detailed guide to building M16A2 clones, focusing on the technical specifications and historical context of the rifle. It covers key components like the A2 stock, lower receiver reinforcements, adjustable rear sight, barrel twist rate changes for M855 ammunition, and the evolution of the flash suppressor to a compensator. The presenter, with apparent extensive experience, explains the differences between A1 and A2 variants and offers insights into sourcing parts and achieving an authentic build.

Quick Summary

The M16A2 rifle features several key upgrades over its predecessor, including a reinforced lower receiver, a longer and more durable A2 stock, and an adjustable rear sight. Its barrel twist rate was changed to a 1:7 inch to stabilize the heavier 5.56 NATO M855 cartridge, and the flash suppressor was replaced with a compensator to reduce muzzle rise.

Chapters

  1. 00:05Introduction to M16A2 Clones
  2. 00:23M16A2 vs. Modern Rifles
  3. 00:40Basic Training at Fort Benning
  4. 01:08M16A2 Clone Manufacturers
  5. 01:42All Colt M16A2 Clone Build
  6. 02:12Colt AR-15 A2 Government Model
  7. 02:39Colt Sporter Series Lowers
  8. 03:19M16A2 Component Details
  9. 03:24M16A2 Stock Features
  10. 03:50Forward Assist Variations
  11. 04:16A1 vs. A2 Lower Receiver Differences
  12. 04:50M16A2 Adjustable Rear Sight
  13. 05:33M16A2 Upper Receiver
  14. 05:58Canted Delta Ring
  15. 06:08M16A2 Handguards
  16. 06:25M16A2 Barrel Specifications
  17. 07:01Flash Suppressor vs. Compensator
  18. 07:275.56 NATO Cartridge
  19. 07:58Barrel Twist Rate: 1:12 vs. 1:7
  20. 08:561:7 Twist Rate Significance
  21. 09:01Building a Specific M16A2 Clone
  22. 09:14Bayonet Lug Removal
  23. 09:34Replacing Upper Receiver & Barrel
  24. 10:07Standard Handguards
  25. 10:15Lower Receiver Push Pin Modification
  26. 10:50Colt Sporter Lower Receiver Details
  27. 11:01Auto Sear Block Function
  28. 11:24Hammer and Trigger Pin Size Changes
  29. 12:15Proprietary Colt Components
  30. 12:46Colt's Switch to Milspec Pins
  31. 13:11Building an M16A2 Clone Today
  32. 13:22Arrow Precision Components
  33. 13:33Upper Receiver Feed Ramps
  34. 13:51Gunsmithing Feed Ramps
  35. 14:39Stock Assembly
  36. 14:41Lower Receiver Notch & Pictograms
  37. 14:55Arrow Precision Lower Build
  38. 15:23Sourcing Upper Receivers
  39. 15:48Fixed Carrying Handle vs. Flattop
  40. 15:51Optic Mounting on Carrying Handle
  41. 16:18Old-School Iron Sight Build
  42. 16:35Current M16A2 Variants
  43. 16:53Receiver Color Matching
  44. 17:05Milspec Color Standards
  45. 17:34Commercial Market Aesthetics
  46. 18:28Historical Receiver Finishes
  47. 19:23Ease of M16A2 Duplication
  48. 19:54M16A2: A Transitional Rifle
  49. 20:09Marine Corps Development Role
  50. 20:22Rear Sight Manufacturing Cost
  51. 20:30Marine Corps vs. Army Sight Usage
  52. 20:45A1 Rear Sight vs. A2 Rifle
  53. 20:52C7 McCain Rifle
  54. 21:04Transition to M16A4
  55. 21:12M16A2 Combat History
  56. 21:24Current M16A2 Usage
  57. 21:39M4 Replacing M16A2/A4
  58. 21:50Marine Corps M4 Adoption
  59. 22:06Future Replacement Programs
  60. 22:14New Programs: M16A4/A5
  61. 22:28Request for Quote (RFQ)
  62. 22:33Barrel Length Requirements
  63. 22:41Operating System Uncertainty
  64. 22:48Conclusion & Thanks

Frequently Asked Questions

What are the key differences between the M16A1 and M16A2 lower receivers?

The M16A2 lower receiver is significantly more reinforced, particularly in the rear section. Additionally, the front section of the M16A2 lower receiver angles upwards, whereas the M16A1's front section is straight over. These changes contribute to increased durability and strength in the A2 variant.

Why was the barrel twist rate changed for the M16A2?

The M16A2 introduced the 5.56 NATO M855 cartridge, which features a heavier 62-grain projectile. To stabilize this heavier bullet effectively, the barrel twist rate was changed from the M16A1's 1:12 inch to the M16A2's 1:7 inch. This change was also influenced by the need for projectile stabilization in arctic conditions.

What is the purpose of the M16A2's compensator instead of a flash suppressor?

The M16A2's compensator, with its solid bottom, was designed to reduce muzzle rise during firing, especially when in a prone position. This helps prevent the muzzle blast from kicking up dust and dirt from the ground, improving shooter visibility and reducing disturbance.

Can I easily build an M16A2 clone today?

Yes, building an M16A2 clone is generally straightforward as many components are available. While Colt no longer offers direct A2 long rifles, manufacturers like Arrow Precision provide lower receivers and trigger groups. Sourcing an appropriate upper receiver and barrel is key, and some minor gunsmithing may be required for exact replication.

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