Добавил: The DSystem
This was actually quite easy,
all I did was edit the ctx so it shot a projectile in single player (in multiplayer the gun still shoots a nail, but the nail does 0 damage, it makes it a hitscan) ,replace the syringe (and textures) with a nail so it made it a nail gun, also it makes the pistol bucket images the nailgun.
critique as you like
(note: medic syringes are now nails also, sorry can't fix that)
(note 2: this does not include the nailgun for the pistol, you can get it: here)
(note 3: does not work with any mod that replaces the muzzleflash, since it replaces the script for the pistol as well)