List of modifications to vanilla attributes

Attribute	New behavior
alt-fire disabled	Actually blocks alt-fire from the weapon
armor piercing	Values above 100 are applied properly
paintkit_proto_def_index	Applying value in popfile works
dmg bonus while half dead	Works on non-melee weapons
dmg penalty while half alive	Works on non-melee weapons
damage bonus (and other mult_dmg attributes)	Works on kart impact damage and mantreads fall damage
dmg penalty vs players	Works on kart impact damage and mantreads fall damage
restore health on kill	Works on mantreads fall damage
fire rate bonus with reduced health	Works on melee weapons
explosive sniper shot	Works on any headshot capable weapon
attack projectiles	Works on any weapon
engy building health bonus	Also works on disposable sentries
custom projectile model	Works on most projectiles