AN-94

The AN-94 is a unreleased weapon that was leaked by Justin in one of his streams. In the stream, he shows the gun name as, but in the middle of the video, the source codes the unreleased update shown up. If you look into it and zoom in, you can see a weapon, called the AN-94 is in the unreleased code. Not a lot of it is known, but is is a Assault Rifle that uses 7.62mm, firing in bursts, similar to the UMP9 and the FAMAS. Unlike the UMP9 and FAMAS, this gun fires in 2 bursts instead of the normal 3. It can be infered that its damage is going to be higher than 17, since it's a 2 burst rifle.

The screenshot of the Source Code in the streaming background: