Blow-back mechanism for rifle | Introduction to Firearms

Use this week’s discussion to develop a collective understanding of the various mechanisms of blow-back operations by answering the following prompt.

Blow-back  is one of the most misunderstood and oversimplified mechanisms of operation among many firearms enthusiasts. For this discussion, choose any two variants of blow back operations and compare and contrast them.

Explain how they are similar and how they are not.