Ep-9: Choosing the Right AR-15 Buffer Weights, Springs & Buffer Tubes... Starts Here!

Published on October 28, 2022
Duration: 13:18

This video details AR-15 buffer assemblies, explaining the roles of buffer weights, springs, and buffer tubes in the firearm's cycling mechanics. It covers variations in buffer tube lengths and diameters (Rifle vs. Carbine, Mil-Spec vs. Commercial) and standard carbine buffer weights (3oz, H1, H2, H3). The content emphasizes matching buffer weight and spring to barrel length and gas system for optimal performance, recommending H2 as a versatile starting point for 5.56/.223 builds.

Quick Summary

The AR-15 buffer assembly absorbs BCG recoil and drives it forward for chambering. Key components include buffer tubes (Rifle/Carbine, Mil-Spec/Commercial) and buffer weights (Standard, H1, H2, H3). Choosing the correct weight and spring is crucial for reliable cycling, especially based on barrel length and gas system configuration.

Chapters

  1. 00:00Intro to Buffer Assemblies
  2. 01:50AR-15 Cycling Mechanics
  3. 03:59Buffer Tube Variations (Rifle vs Carbine, Mil-Spec vs Commercial)
  4. 06:14Carbine Buffer Weights Explained (3oz, H1, H2, H3)
  5. 09:15Buffer Spring Types and Specs
  6. 11:13Choosing the Right Buffer Combo

Frequently Asked Questions

What are the main functions of an AR-15 buffer assembly?

The AR-15 buffer assembly, consisting of the buffer, spring, and buffer tube, absorbs the rearward force of the bolt carrier group (BCG) after firing and then drives the BCG forward to chamber a new round, ensuring reliable cycling.

What are the different types of AR-15 buffer tubes?

AR-15 buffer tubes come in two main lengths: Rifle (approx. 10 inches) and Carbine (approx. 7.25 inches). They also differ in diameter: Mil-spec (1.148 inches) and Commercial (1.168 inches), with Mil-spec being the industry standard.

What are the common weights for AR-15 carbine buffers?

Common carbine buffer weights include the Standard (3oz), H1 (3.8oz), H2 (4.6-4.8oz), and H3 (5.0-5.4oz). The H2 is often recommended as a versatile starting point for 5.56/.223 builds.

How do I choose the right AR-15 buffer weight?

Buffer weight selection depends on your barrel length and gas system. Lighter buffers suit longer barrels with mid/rifle gas, while heavier buffers (like H3) are better for short barrels with carbine gas, especially when suppressed.

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