The Original Knights Armament SR25 Sniper Rifle

Published on August 25, 2018
Duration: 21:25

This video provides an in-depth review of an original Knight's Armament SR-25, a rifle designed by Eugene Stoner. The presenter, who acquired the rifle directly from Stoner in 1995, details its historical significance as a precursor to the M110 and Mark 11 sniper systems. Key features discussed include its AR-10/AR-15 lineage, the 7.62x51mm NATO caliber, specific barrel rifling, chamber design for M118 LR ammunition, and modifications made over time, such as the URX handguard and enhanced stock. The video also touches upon the rifle's development, commercial sales, military adoption, and the ongoing debate between semi-automatic and bolt-action sniper rifles.

Quick Summary

The Knight's Armament SR-25, designed by Eugene Stoner, combines elements of the AR-15 and AR-10, with '25' representing 10+15. Its barrel is a high-quality Remington M24 with 5R rifling, and the chamber is optimized for M118 LR ammunition to enhance precision by minimizing bullet jump.

Chapters

  1. 00:06Introduction to the SR-25
  2. 00:14Acquisition and Eugene Stoner Connection
  3. 00:46First Generation SR-25 History
  4. 01:10Modifications: Handguard and Stock
  5. 01:51Bolt Catch and Ambidextrous Features
  6. 02:16Origin of the SR-25 Name
  7. 02:30Reviving the AR-10 Legacy
  8. 03:09Upper Receiver Features
  9. 03:27Absence of Forward Assist
  10. 04:07Ambidextrous Safety Selector
  11. 04:13Lower Receiver and Magazine Release
  12. 04:27Magazine Development and History
  13. 05:22Barrel Specifications and Remington Source
  14. 06:11Chamber Design for M118 LR
  15. 07:11Ammunition Compatibility and Modifications
  16. 07:37Accuracy and MOA Guarantee
  17. 07:57URX Rail and Front Sight
  18. 08:04Early Gas Valve Feature
  19. 08:19Bolt Carrier Group Details
  20. 09:32Trigger Mechanism
  21. 09:52Buffer System Evolution
  22. 10:25Folding Rear Sight
  23. 10:31Scope Selection
  24. 10:53Commercial Sales and Military Adoption
  25. 11:39Market Availability and Pricing
  26. 12:18Original SR-25 vs. Modern Variants
  27. 12:29M110 SASS Enhancements
  28. 13:14Semi-Automatic vs. Bolt-Action Debate
  29. 15:02Military User Feedback on SR-25/M110
  30. 16:06Tradition vs. Modern Sniper Rifle Benefits
  31. 17:49Range Test and Final Thoughts

Frequently Asked Questions

What is the origin of the Knight's Armament SR-25 name?

The 'SR' in SR-25 stands for Stoner Rifle, honoring its designer, Eugene Stoner. The '25' is derived from a combination of the AR-15 and AR-10 platforms, specifically 10 + 15 = 25, signifying its lineage and evolution.

What makes the barrel of the original SR-25 significant?

The barrel on this 1995 SR-25 is a Remington M24 barrel, known for its accuracy and featuring 5R rifling. This was a significant feature as Remington typically did not sell these barrels to other manufacturers, highlighting the rifle's high-end construction.

How was the SR-25 chamber designed for optimal accuracy?

The chamber was specifically engineered for M118 and M118 LR cartridges. This design ensures that upon chambering, the projectile's ogive is very close to touching the rifling's lands and grooves, minimizing bullet jump and maximizing precision.

Why does the SR-25 lack a forward assist?

Eugene Stoner, the rifle's designer, omitted the forward assist because he believed it was unnecessary when the rifle is used properly. This design choice reflects his philosophy of creating reliable firearms that do not require external assistance for bolt operation.

What was the initial funding source for the SR-25 development?

The entire development of the SR-25 was funded through commercial sales. This commercial success paved the way for its eventual adoption by SOCOM as the Mark 11, after which production shifted heavily towards military contracts.

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