The Mount utilises the 4 existing grubscrews to mount into the chrono graph and then it is a simple process of holding down the 2 tabs, sliding down the barrel to desired place and releasing the 2 tabs. 

The case has a 25mm boss in the inside which the bracket clamps on and secured the chronograph between 2 ribs near the bottom. The lid is held closed by 2 magnets which securely holds it closed whilst allowing easy access when needed. 

Printed in orange by default as i was forever putting the chronograph down and loosing it, although please contact me if you require another colour. 

Please note Although the clamp is plastic, as per the original supplied mounts, every care must be taken that the barrel and mount is clean before using otherwise scratching of the barrel may occur. 

The chrono and airgun in the photos is not included and are for illustration only.