How Does it Work: Gas-Delayed Blowback

Published on June 11, 2019
Duration: 3:46

This video explains the gas-delayed blowback operating system, highlighting its use in handguns like the Steyr GB, Heritage Stealth C-1000, and H&K P7. It details two main mechanisms: the barrel acting as a gas piston and a separate gas piston. The system offers advantages such as reduced recoil and improved accuracy due to a lighter slide and fixed barrel, but can suffer from heat transfer issues during sustained fire.

Quick Summary

Gas-delayed blowback is a firearm operating system that uses gas pressure to slow down the opening of the slide. Gas vents from the barrel or chamber, creating forward pressure that delays the breech from unlocking until chamber pressures have safely decreased, offering benefits like reduced recoil.

Chapters

  1. 00:00Introduction to Gas-Delayed Blowback
  2. 00:23Mechanism Variation 1: Barrel as Gas Piston (Steyr GB)
  3. 01:22Mechanism Variation 2: Separate Gas Piston (Heritage Stealth C-1000)
  4. 02:08Advantages and Disadvantages of Gas-Delayed Blowback
  5. 02:48System Limitations and Misidentified Systems (VG 1-5)

Frequently Asked Questions

What is gas-delayed blowback and how does it work in handguns?

Gas-delayed blowback is a firearm operating system that uses gas pressure to slow down the opening of the slide. Gas vents from the barrel or chamber, creating forward pressure that delays the breech from unlocking until chamber pressures have safely decreased.

What are the main advantages of the gas-delayed blowback system?

Key advantages include a lighter slide, which reduces felt recoil and can improve accuracy. The fixed barrel design, common in these systems, also contributes to better inherent accuracy compared to moving barrel designs.

What are the primary disadvantages of gas-delayed blowback firearms?

The main drawback is heat management. Gas trapped within the mechanism, particularly in designs like the H&K P7, can transfer significant heat to the frame and trigger guard area during sustained firing, making the firearm hot to the touch.

Which handguns commonly use the gas-delayed blowback system?

Notable examples include the Steyr GB, the Heritage Stealth C-1000, and the Heckler & Koch P7 series. These pistols showcase different implementations of the gas-delayed blowback principle.

Related News

All News →

More Reviews Videos You Might Like

More from Forgotten Weapons

View all →