How Powerful are Short Barrel AR-15s?

Published on May 1, 2016
Duration: 6:36

This video tests the ballistic performance of a short-barreled AR-15 pistol (7.5-inch barrel) against a standard 18-inch rifle. Results show a significant velocity reduction of approximately 26% in the short barrel compared to the longer one, with the 7.5-inch barrel averaging 2203 fps versus 2977 fps for the 18-inch barrel. The build features components from Anderson Arms, Ground Zero Precision, Shockwave Technologies, Midwest Industries, and a Holosun optic, with a Griffin Armament suppressor.

Quick Summary

A 7.5-inch barrel AR-15 pistol lost approximately 26% of its velocity compared to an 18-inch rifle barrel. The short barrel averaged 2203 fps, while the longer barrel averaged 2977 fps, highlighting significant ballistic differences.

Chapters

  1. 00:00Intro: Super Shorty AR-15
  2. 00:26Build Breakdown: Components Used
  3. 01:28Suppression Demo: Unsuppressed vs Suppressed
  4. 01:49Velocity Testing Goals
  5. 02:55Short Barrel Chronograph Results (7.5")
  6. 03:59Long Barrel Comparison (18")
  7. 04:51Conclusion: Power Loss Analysis

Frequently Asked Questions

How much velocity does a short barrel AR-15 lose compared to a standard rifle?

A 7.5-inch barrel AR-15 pistol lost approximately 26% of its velocity compared to an 18-inch rifle barrel. The short barrel averaged 2203 fps, while the longer barrel averaged 2977 fps.

What are the key components in the short barrel AR-15 build shown?

The build features an Anderson Arms lower receiver, a 7.5-inch barrel from Ground Zero Precision, a Shockwave Technologies Blade stabilizer, a Midwest Industries rail, and a Holosun optic.

What is the average velocity of a 5.56 round from a 7.5-inch AR-15 barrel?

During testing, the 7.5-inch barrel recorded velocities ranging from 2149 to 2302 fps, with a mean average of 2203 fps.

How does a suppressor affect a short barrel AR-15?

The video demonstrates using a Griffin Armament Optimus modular suppressor on the short-barreled AR-15 pistol, showing its application for reducing sound and potentially flash during firing.

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