Armalite M15A4 SPR AR15 Rifle

Published on August 28, 2011
Duration: 9:49

This review of the ArmaLite M15A4 SPR Special Purpose Rifle highlights its heavy barrel configuration and 20-inch barrel, making it suitable for target and long-range shooting. The experienced reviewer details its history, technical specifications like the two-stage trigger and 1:9 twist rate, and compares it to lighter carbine configurations. Recommendations are made for accessories and ammunition compatibility.

Quick Summary

The ArmaLite M15A4 SPR is a Special Purpose Rifle featuring a heavy 20-inch barrel, ideal for target and long-range shooting. It's chambered for 5.56 NATO/.223 Remington, has a 1:9 twist rate, and a two-stage trigger. Weighing 7 lbs 13 oz, it offers increased velocity and better heat management than shorter barrels.

Chapters

  1. 00:31ArmaLite M15A4 SPR Intro
  2. 01:16ArmaLite History & Design
  3. 01:41Furniture & Fit/Finish
  4. 02:08Handguard & Accessories
  5. 02:38Barrel Specs
  6. 03:11Included Optics & Rail
  7. 03:33Heavy Barrel Configuration
  8. 03:55Sights & Chambering
  9. 04:41Trigger Specs
  10. 05:04Magazine Preference & Ammo
  11. 05:43Ergonomics & Cheek Weld
  12. 06:07Included Scope Details
  13. 06:18Weight Comparison
  14. 06:40Barrel Length Comparison (20" vs 16")
  15. 07:23Barrel Heat & Gas System
  16. 07:49Buffer Tube & Cycling
  17. 08:12Recommendations for Beginners
  18. 08:43Outro

Frequently Asked Questions

What is the ArmaLite M15A4 SPR designed for?

The ArmaLite M15A4 SPR is a Special Purpose Rifle, characterized by its heavy barrel configuration and 20-inch barrel, making it ideal for target shooting and long-range applications where accuracy is paramount.

What are the key technical specifications of the ArmaLite M15A4 SPR?

The M15A4 SPR features a 20-inch heavy barrel with a 1:9 twist rate, chambered for 5.56 NATO / .223 Remington. It includes a two-stage trigger with a 3.5 lb first stage and a 5-6 lb second stage, and weighs 7 lbs 13 oz without accessories.

How does the 20-inch barrel of the M15A4 SPR compare to a 16-inch barrel?

A 20-inch barrel offers increased velocity (approx. 200 FPS gain) and better heat dissipation for sustained accuracy compared to a 16-inch barrel. However, 16-inch barrels are lighter and more maneuverable for general use up to 300 yards.

What ammunition is recommended for the ArmaLite M15A4 SPR?

The rifle is chambered for 5.56 NATO and can safely shoot .223 Remington. For optimal stabilization with its 1:9 twist rate, bullets from 52 to 69 grains are recommended. Good quality ammunition, such as HPR, is advised.

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