Applied Sciences | Free Full-Text | Application of Design of Experimental Methods in Theoretical Analysis of the Gas-Delayed Blowback Operation Firearm Action
Locked breech - Wikipedia
Historical Firearms | Matthew Moss on Twitter: "McClean's Early Semi-Automatic Pistol https://t.co/AxrlfgumsY A look at Samuel McClean's complicated but ingenious gas-operated, rotating locked breech pistol, dating from 1898. #history #firearmshistory ...
File:Delayed blow back breech with locking rollers.jpg - Wikimedia Commons