Colt SP1 Vs Colt AR15-A2

Published on May 28, 2015
Duration: 13:03

This video provides an expert comparison between the Colt SP1 and Colt AR15-A2 Sporter rifles, focusing on accuracy and long-range performance. The analysis, presented with high authority by Military Arms Channel, delves into the impact of different twist rates (1:12 vs. 1:7) on bullet stabilization with 55gr ammunition at 100 yards, and assesses the A2's superior long-range capabilities.

Quick Summary

Expert analysis compares the Colt SP1 and AR15-A2 Sporter rifles. At 100 yards with 55gr ammo, the A2 Sporter (1.5" group) slightly outperformed the SP1 (2" group). The A2's adjustable sights make it superior for long-range, hitting targets at 500 yards, while the SP1's 1:12 twist surprisingly stabilized 69gr bullets.

Chapters

  1. 00:00Colt SP1 Introduction
  2. 01:10Colt AR15-A2 Sporter Overview
  3. 01:58Ammunition and Test Objectives
  4. 07:13A2 Sporter Historical Context
  5. 08:53Accuracy Comparison Results
  6. 11:13Long Range Performance and Conclusion

Frequently Asked Questions

What are the key differences between the Colt SP1 and Colt AR15-A2 Sporter rifles?

The Colt SP1 (1971) features a 20-inch pencil barrel with a 1:12 twist rate. The AR15-A2 Sporter has a 20-inch barrel with a faster 1:7 twist rate, A2 adjustable sights, a brass deflector, and a forward assist. Historically, the A2 also had features modified to comply with pre-ban regulations.

How did the Colt SP1 and AR15-A2 Sporter compare in accuracy at 100 yards?

Using Wolf Gold 55gr .223 Remington ammunition, the Colt AR15-A2 Sporter achieved a best group of 1.5 inches, while the Colt SP1 produced a best group of 2 inches. Both rifles showed comparable performance, indicating minimal impact from the twist rate difference at this distance with this specific ammunition.

Can the Colt SP1's 1:12 twist rate stabilize heavier bullets?

Yes, the Colt SP1's 1:12 twist rate surprisingly demonstrated the ability to stabilize 69gr match bullets without keyholing, suggesting its capability extends beyond lighter projectiles and challenging common assumptions about twist rate limitations.

Which rifle is better for long-range shooting, the Colt SP1 or AR15-A2 Sporter?

The Colt AR15-A2 Sporter is superior for long-range shooting primarily due to its A2 adjustable rear sights, which allow for more precise elevation and windage adjustments. This was demonstrated by its successful engagement of a steel plate at 500 yards.

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