Barrel insert K7.62 a V-shaped mounting prism with

a V-shaped mounting prism with special adjusting screws (the screws allow adjusting the angle of the sensor against the barrel's axis to offset parallax)

and a metal strap with a screw

Barrel insert K9 aka 9mm aka

This cutting-edge program includes all possible analytical tools

Barrel insert K7.62 a V-shaped mounting prism withBarrel insert K7. 62 aka 7. 62mm aka . 308cal aka . 30cal It simply inserts into the barrel and is then tightened by an expanding collet. The collet in the picture is anodized aluminum, but the current version is brass. Works well for said calibers when it is impossible or inconvenient to mount your SCATT optical sensor on the barrel or gas cylinder via a regular mounting system.