M16A4 + ACOG to 500yds: Practical Accuracy (BCM upper)

Published on October 4, 2018
Duration: 6:15

This review tests the practical accuracy of an M16A4 build with a BCM upper and Trijicon ACOG at distances up to 500 yards. The 20-inch barrel proved advantageous over the M4 at longer ranges, aided by the ACOG's clarity and BDC reticle. The test utilized IMI 55gr M193 ammunition and demonstrated a high hit rate once hold-overs were mastered.

Quick Summary

The M16A4's 20-inch barrel offers a significant accuracy advantage over the M4 at 400-500 yards due to higher projectile velocity and a flatter trajectory. The Trijicon ACOG's BDC reticle, combined with aiming techniques like 'chest-head-hat', aids in compensating for bullet drop at extended ranges.

Chapters

  1. 00:00Introduction & Rifle Setup
  2. 00:37Technical Specifications & Ammo
  3. 00:51Live Fire: 150 to 500 Yards
  4. 02:46Performance Analysis: M16A4 vs M4
  5. 04:55Statistical Results & Conclusion

Frequently Asked Questions

What are the key advantages of the M16A4's 20-inch barrel for long-range shooting?

The 20-inch barrel on the M16A4 provides a significant ballistic advantage over shorter barrels like those on the M4, especially at distances of 400-500 yards. This longer barrel allows the projectile to achieve higher velocities, resulting in a flatter trajectory and increased accuracy at extended ranges.

How does the Trijicon ACOG's BDC reticle help with accuracy?

The Trijicon ACOG's Bullet Drop Compensating (BDC) reticle features specific markings designed to estimate bullet drop at various distances. By using methods like the 'chest-head-hat' aiming technique, shooters can effectively use these reticle points to compensate for bullet drop and achieve accurate hits on targets far away.

What ammunition was used in the M16A4 practical accuracy test?

The practical accuracy test utilized IMI 55gr M193 ball ammunition. This is a standard 5.56x45mm NATO round commonly used in AR-15 platform rifles, and it performed reliably in achieving a high hit rate during the evaluation.

What were the environmental conditions during the M16A4 accuracy test?

The shooting conditions during the M16A4 practical accuracy test were challenging, with sustained winds of 12 mph. The temperature was 97°F with a relative humidity of 63%, factors that require careful consideration for accurate long-range shooting.

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