Metropolice Combat Animations?

Upon playing around with the HL2 model viewer, i found quite a few interesting animations that i don’t see used by CPs in Gmod, a few include:

-Running with a pistol animation (CPs use their Stunstick running anim currently)
-A Stunstick Thrusting Animation
-Crouching Animations
-A Grenade throwing Animation
-Aiming animations for SMG (unlike being fired from the Hip constantly)

I’m curious as to why some of these animations aren’t used.
I haven’t played HL2, so i don’t know if any of these unused animations are purely for scripted scenes.

They were used, just in a older version of garrysmod.

Some of those anims are probably used in HL2RP schemas.