weapon dryfire sequences

[yeckoh]

doesn't have a dryfire sequence and plays a sound when trying to fire:
-mac10
-overunder shotgun
-r700 (reuses idle seq so technically has one, and would put it in the no firing pin category)
-ar9mm
-glock

has an animation, no firing pin sound:
-pistol
-rifle
-shotgun

has an ACT_VM_DRYFIRE sequence, doesn't play ingame:
-revolver

no idea:
-snubnose revolver (has a sequence, untestable atm)