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How Does It Work: Roller Delayed Blowback

How Does It Work: Roller Delayed Blowback

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Published on March 17, 2020
Duration: 2:52

This video provides an in-depth explanation of the roller-delayed blowback operating system, a mechanism developed by Mauser engineers. It details how the system, which originated from attempts to create a roller-locked G43, relies on an angled wedge and rollers to mechanically disadvantage the bolt, delaying its rearward movement until chamber pressure safely drops. The description highlights its application in prototype French arms, the Spanish CETME, and prominently in Heckler & Koch firearms, including the iconic G3 rifle. The video also touches on the system's tendency to open faster than locked actions and the necessity of chamber fluting for reliable extraction.

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