Mk18 Suppressed (Way Too Gassy)

Published on May 16, 2024
Duration: 0:26

This Mk18 build, when suppressed, is excessively gassy, leading to a poor shooting experience rated 1/10. The primary issue identified is the need for an adjustable gas block to tune the system for suppressed fire, mitigating the gas blowback into the shooter's face. The setup includes an EOTech optic, SureFire suppressor, and Magpul PMAG.

Quick Summary

A suppressed Mk18 rifle can be 'too gassy' due to increased back pressure from the suppressor, forcing excess gas into the shooter's face. The recommended solution is installing an adjustable gas block to tune the system and mitigate this blowback for a better shooting experience.

Chapters

  1. 00:00Mk18 Setup Overview
  2. 00:06Shooting and Gas Blowback
  3. 00:17Shooting Experience and Solution

Frequently Asked Questions

Why is a suppressed Mk18 considered 'too gassy'?

A suppressed Mk18 is 'too gassy' because the suppressor redirects excess gas back towards the shooter's face. This direct impingement system, when combined with a suppressor, can overwhelm the standard gas system, leading to significant gas blowback and an uncomfortable shooting experience.

What is the recommended solution for an over-gassed suppressed Mk18?

The recommended solution for an over-gassed suppressed Mk18 is to install an adjustable gas block. This allows the shooter to precisely tune the amount of gas entering the system, mitigating the excessive blowback and improving the overall shooting experience.

How does a suppressor affect the gas system of an AR-15 like the Mk18?

A suppressor increases back pressure within the barrel, forcing more gas to cycle the action. On direct impingement systems like the Mk18, this often leads to an 'over-gassed' condition, where too much gas is vented into the receiver, causing increased recoil and blowback.

What components were visible on the Mk18 in the video?

The Mk18 rifle featured an EOTech EXPS optic, a SureFire SOCOM suppressor (model SOCOM556-RC2), a vertical grip, and a Magpul PMAG 30-round magazine. A weapon light was also mounted.

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