How to Choose the best AR15 Buffer Weight

Published on January 10, 2020
Duration: 4:48

This guide, presented by Dave Timm from Guns & Tactics, details how to select the correct AR-15 buffer weight. It covers buffer basics, different weight options (Standard, H1, H2, H3), and how they affect cyclic rate. The guide emphasizes function checks and using ejection patterns for diagnostics, especially for SBRs and suppressed firearms. Expert advice is provided for specific calibers and consulting professionals for optimal builds.

Quick Summary

Choosing the right AR-15 buffer weight is crucial for optimal firearm performance. Heavier buffers (H1, H2, H3) slow the cyclic rate, ideal for SBRs and suppressed use due to higher gas pressure. Lighter buffers increase the rate. Diagnostics like the 'clock' method (ejection patterns) help tune the system, with 3-4 o'clock being the target.

Chapters

  1. 00:00Introduction to AR-15 Buffer Weights
  2. 00:37Buffer Basics and Function
  3. 01:22Buffer Weights and Cyclic Rates Explained
  4. 01:49Testing and Function Checks
  5. 02:11SBRs and Suppressed Shooting Considerations
  6. 02:42Ejection Pattern Diagnostics
  7. 03:43Professional Consultation for Specific Calibers

Frequently Asked Questions

What is the purpose of an AR-15 buffer?

The AR-15 buffer, along with its spring, resides in the receiver extension and absorbs recoil energy. It controls the bolt carrier group's speed, preventing it from slamming too hard and ensuring reliable cycling of the firearm.

How do different AR-15 buffer weights affect performance?

Heavier buffers (like H1, H2, H3) slow down the bolt carrier group's cycle rate, which is beneficial for managing increased gas pressure in SBRs or suppressed firearms. Lighter buffers increase the cyclic rate.

What is the 'clock' method for diagnosing AR-15 buffer issues?

The 'clock' method uses spent casing ejection patterns to diagnose gas system tuning. A 3-4 o'clock ejection is ideal. 12-3 o'clock suggests over-gassing or a light buffer, while 4-6 o'clock indicates under-gassing or a buffer that's too heavy.

When should I use a heavier buffer in my AR-15?

Heavier buffers are recommended for Short-Barreled Rifles (SBRs) and suppressed firearms, as these configurations typically generate higher gas pressure. This helps ensure the bolt carrier group cycles correctly and locks back reliably on an empty magazine.

Related News

All News →

More Tactical & Gear Videos You Might Like

More from UN12 Magazine

View all →