Can't get/set Animation time or frame in script

Hi All - I can't seem to properly get/set the frame of animation for a projectile I'm shooting:

When I try to reference anim.playbackTime , I get a notification that I need to StartPlayback(). If I Startplayback in the script though.. my collision detection gets killed .

Also, I just noticed that the primary animation for my bullet never progresses past the first frame, and I have no idea why.

(In gameplay mode, just aim and click with mouse to shoot)

Bullet location: pistol_bullet in Prefabs folder
StraightProjectileMovement.cs is the script

Alternatively, I'd like to get a trigger to see when I can see the end of an animation, rather than simply having to manually check for the frame number itself. I.e. "When explosion animation is done, then Destroy the gameobject"

Project:
https://www.dropbox.com/sh/gr9aqmfvky2sjes/WXoXmT_brd

Scene:
https://www.dropbox.com/s/4tivoan77t1u8fj/F***Everything.unity.meta

Any help appreciated, and please excuse any saltiness you may find in the code/assets