ID for 105mm-like finned projectile

[timefuze]

Hi,

Can someone ID the projectile in the picture below please? Picture is from an article on internet (Weaselhead, US).
Came across an inert one (stamped 'inert' in the body) but have no clue what it is nor what gun it was fired from.




Thanks for any ID help!

Timefuze

 

[US-Subs]

106mm recoilless rifle. HEAT round, potentially very sensitive, do not disturb when found in the wild.

 

[US-Subs]

Here is a clean one.