Dave Hartley ⚓ on Twitter: "Here is the breech of the forward gun being closed by one of our volunteers Dave. You can see the interrupted screw breech turning and locking in
![J.Beattie ( 20 Regent St. London ) Model Screw Breech .40 CF Cal Single Shot Rook Style Rifle w/ 25" J.Beattie ( 20 Regent St. London ) Model Screw Breech .40 CF Cal Single Shot Rook Style Rifle w/ 25"](https://dygtyjqp7pi0m.cloudfront.net/i/32146/27679115_5.jpg?v=8D4E72D4D04FE40)
J.Beattie ( 20 Regent St. London ) Model Screw Breech .40 CF Cal Single Shot Rook Style Rifle w/ 25"
![Interrupted screw for breech of 15 cm howitzer (from Meyers Lexikon, 1895, 7/442) Stock Illustration | Adobe Stock Interrupted screw for breech of 15 cm howitzer (from Meyers Lexikon, 1895, 7/442) Stock Illustration | Adobe Stock](https://as2.ftcdn.net/v2/jpg/01/24/22/61/1000_F_124226115_H9DcsjrAwsxn0FmNGzV4cY1NnMJ5y6r5.jpg)
Interrupted screw for breech of 15 cm howitzer (from Meyers Lexikon, 1895, 7/442) Stock Illustration | Adobe Stock
![Photos showing operation of Bofors ogival screw breech block. Depicted is US 6-inch gun Stock Photo - Alamy Photos showing operation of Bofors ogival screw breech block. Depicted is US 6-inch gun Stock Photo - Alamy](https://c8.alamy.com/comp/2H15DY6/photos-showing-operation-of-bofors-ogival-screw-breech-block-depicted-is-us-6-inch-gun-2H15DY6.jpg)
Photos showing operation of Bofors ogival screw breech block. Depicted is US 6-inch gun Stock Photo - Alamy
![Breech Mechanism Interrupted Screw Threads Bange Stock Vector (Royalty Free) 286352354 | Shutterstock Breech Mechanism Interrupted Screw Threads Bange Stock Vector (Royalty Free) 286352354 | Shutterstock](https://www.shutterstock.com/image-vector/breech-mechanism-interrupted-screw-threads-260nw-286352354.jpg)