Picatinny barrel rail designed to fit under the scope rail of the Artemis P15.
It is split into two halves and once fitted is held together using 4 screws, it allows the user to mount torches/ lasers etc to their rifle.
A lot of the time accessories are mounted on top of the scope making the rifle more top heavy than it needs to be, this rail allows the weight to be kept lower down making the rifle more comfortable to use