Cant Animate Weapon

Hello i am having trouble animating my weapon. I have my weapon connected with a Motor 6 but i cant selected in the animation editor (Moon Animation). Heres a video:

Gyazo

https://gyazo.com/1b8255bfa443d433a530de038a84052b

Use Animator Editor Plugin. I think it comes by default in roblox studio

Yea i am using that but i cant seem to export my animation, thank you for responding