I Put An Adjustable Gas On My 6.5 Grendel Pistol!

Published on March 3, 2021
Duration: 8:36

This video demonstrates the process of tuning an adjustable gas block on a 6.5 Grendel pistol and a .308 rifle. The presenter walks through incrementally opening the gas block until the firearm reliably cycles and locks the bolt back. Challenges encountered with the .308 build are highlighted, including the potential need to remove buffer weights.

Quick Summary

To tune an adjustable gas block, start with it closed or one click off closed. Fire a round and observe if the bolt locks back. If not, incrementally open the gas block (e.g., half-turn increments) and repeat until reliable cycling and bolt lock-back are achieved. For pistols, more open settings may be necessary.

Chapters

  1. 00:00Introduction: Tuning Adjustable Gas Blocks
  2. 00:22Process Overview: Adjustable Gas Block Tuning
  3. 01:23Tuning the 6.5 Grendel Pistol
  4. 03:38Tuning the .308 Rifle
  5. 04:09Troubleshooting .308 Cycling Issues
  6. 05:24Further .308 Troubleshooting: Buffer Tube
  7. 06:18Grendel Pistol Success & .308 Frustration
  8. 06:30Conclusion and Viewer Input
  9. 07:17Call for Comments: .308 Rifle Issues

Frequently Asked Questions

What is the first step when tuning an adjustable gas block?

The recommended starting point for tuning an adjustable gas block is to close it completely or set it to one click off closed. From there, you incrementally open it while firing to find the optimal gas setting for reliable cycling.

Why would you remove buffer weights when tuning an adjustable gas block?

Removing buffer weights reduces the resistance the bolt carrier group encounters when cycling. This is a troubleshooting step for firearms that are undergassed, even with the adjustable gas block fully open, helping to ensure the bolt locks back.

What are common issues when tuning an adjustable gas block on a pistol build?

Pistol builds, especially short-barreled ones, can be more finicky. They may require more open gas settings to achieve reliable cycling compared to longer-barreled rifles. Be prepared for more adjustments and potential troubleshooting.

What ammunition was used in the video for tuning?

The presenter used Wolf ammunition for the 6.5 Grendel pistol tuning and Red Army ammunition for the .308 rifle troubleshooting. The goal was to find a gas setting that allowed for consistent cycling with the chosen ammo.

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