The barrel assembly is connected to the stock/action group by means of a removable hinge pin.

One improvement over the Source Four is a wider range of adjustment in regards to rotation of the barrel assembly.

The barrel assembly was bent away from the stock behind the bolt.

To change caliber one would need to install a new barrel assembly using the same frame and slide of the original pistol.

The barrel assembly of the 2A18 gun is used by the 2S1 self-propelled howitzer.

Information regarding the W33 has suggested that it was either a double gun and/or that it may have used an annular barrel assembly.

The barrel assembly required three towing animals.

A top-mounted latch released the barrel assembly to open forward.

All guns have carriages or mountings that support the barrel assembly (called the ordnance in some countries).

Folding is accomplished by pulling downward on the trigger guard and swinging the barrel assembly back over the top of the rifle.