Basic AR-15 Practical Accuracy

Published on August 26, 2016
Duration: 26:30

This video tests the practical accuracy of a basic CMMG Mk4 LE AR-15 build using iron sights at up to 300 yards. It demonstrates that a standard rifle can achieve 'minute of man' accuracy at extended ranges, but precision degrades under rapid fire due to heat. The review also highlights how trigger quality and barrel twist affect shooter performance and bullet stabilization.

Quick Summary

A basic AR-15 build with iron sights can achieve 'minute of man' accuracy at 300 yards. However, heat buildup during rapid fire causes shots to 'string,' degrading precision. A better trigger aids shooter accuracy, not the rifle's inherent potential.

Chapters

  1. 00:00Intro: Basic AR-15 Build & Accuracy Goal
  2. 02:22100-Yard Accuracy Test with Iron Sights
  3. 03:36Extended Range: 250 to 300 Yards Accuracy
  4. 09:01Heat & Rapid Fire Effects on Accuracy
  5. 11:11The Role of the Trigger in Accuracy
  6. 12:32Barrel Twist & Gas System Observations

Frequently Asked Questions

What is the practical accuracy of a basic AR-15 with iron sights at 300 yards?

A basic AR-15 build with iron sights can achieve 'minute of man' accuracy at 300 yards, meaning it's capable of hitting a human-sized target reliably, though precision is limited by the sight radius and shooter skill.

How does heat affect AR-15 accuracy during rapid fire?

During rapid fire, heat buildup in a standard barrel causes shots to 'string' or migrate from the original point of aim. This degradation in precision is normal for non-free-floated barrels and high-volume shooting.

Does a better trigger make an AR-15 more accurate?

A better trigger doesn't physically increase the rifle's accuracy potential but allows the shooter to be more accurate. It provides a cleaner break, reducing disturbance during the firing sequence, which helps the shooter achieve better results.

What is the significance of a 1:7 barrel twist rate on an AR-15?

A 1:7 barrel twist rate means the rifling makes one full rotation every seven inches. This rate effectively stabilizes common 55-grain FMJ ammunition and is also capable of stabilizing heavier projectiles.

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