So far this mod works for the following weapons:

Assault rifles
WEAPON_ADVANCEDRIFLE		Display Name: Advanced Rifle
WEAPON_ASSAULTRIFLE		Display Name: Assault Rifle
WEAPON_ASSAULTRIFLE_MK2		Display Name: Assault Rifle Mk II
WEAPON_BULLPUPRIFLE		Display Name: Bullpup Rifle
WEAPON_BULLPUPRIFLE_MK2		Display Name: Bullpup Rifle Mk II
WEAPON_CARBINERIFLE		Display Name: Carbine Rifle
WEAPON_CARBINERIFLE_MK2		Display Name: Carbine Rifle Mk II
WEAPON_COMPACTRIFLE		Display Name: Compact Rifle
WEAPON_HEAVYRIFLE		Display Name: Heavy Rifle
WEAPON_MILITARYRIFLE		Display Name: Military Rifle
WEAPON_SPECIALCARBINE		Display Name: Special Carbine
WEAPON_SPECIALCARBINE_MK2	Display Name: Special Carbine Mk II
WEAPON_TACTICALRIFLE		Display Name: Service Carbine

Shotguns
WEAPON_ASSAULTSHOTGUN		Display Name: Assault Shotgun
WEAPON_AUTOSHOTGUN		Display Name: Sweeper Shotgun 
WEAPON_BULLPUPSHOTGUN		Display Name: Bullpup Shotgun
WEAPON_COMBATSHOTGUN		Display Name: Combat Shotgun
WEAPON_DBSHOTGUN		Display Name: Double Barrel Shotgun
WEAPON_HEAVYSHOTGUN		Display Name: Heavy Shotgun
WEAPON_PUMPSHOTGUN		Display Name: Pump Shotgun
WEAPON_PUMPSHOTGUN_MK2		Display Name: Pump Shotgun Mk II
WEAPON_SAWNOFFSHOTGUN		Display Name: Sawed-Off Shotgun

SMGs
WEAPON_ASSAULTSMG		Display Name: Assault SMG
WEAPON_COMBATPDW		Display Name: Combat PDW
WEAPON_MINISMG			Display Name: Mini SMG 
WEAPON_MACHINEPISTOL		Display Name: Machine Pistol
WEAPON_MICROSMG			Display Name: Micro SMG
WEAPON_SMG			Display Name: SMG
WEAPON_SMG_MK2			Display Name: SMG Mk II

Sniper rifles
WEAPON_HEAVYSNIPER		Display Name: Heavy Sniper
WEAPON_HEAVYSNIPER_MK2		Display Name: Heavy Sniper Mk II
WEAPON_MARKSMANRIFLE		Display Name: Marksman Rifle
WEAPON_MARKSMANRIFLE_MK2	Display Name: Marksman Rifle Mk II
WEAPON_MUSKET			Display Name: Musket
WEAPON_PRECISIONRIFLE		Display Name: Precision Rifle
WEAPON_SNIPERRIFLE		Display Name: Sniper Rifle

Pistols
WEAPON_APPISTOL			Display Name: AP Pistol
WEAPON_CERAMICPISTOL		Display Name: Ceramic Pistol
WEAPON_COMBATPISTOL		Display Name: Combat Pistol
WEAPON_DOUBLEACTION		Display Name: Double-Action Revolver
WEAPON_GADGETPISTOL		Display Name: Perico Pistol
WEAPON_HEAVYPISTOL		Display Name: Heavy Pistol
WEAPON_MARKSMANPISTOL		Display Name: Marksman Pistol
WEAPON_NAVYREVOLVER		Display Name: Navy Revolver
WEAPON_PISTOL			Display Name: Pistol
WEAPON_PISTOL_MK2		Display Name: Pistol Mk II
WEAPON_PISTOL50			Display Name: Pistol .50
WEAPON_PISTOLXM3		Display Name: WM 29 Pistol
WEAPON_REVOLVER			Display Name: Heavy Revolver
WEAPON_REVOLVER_MK2		Display Name: Heavy Revolver Mk II
WEAPON_SNSPISTOL		Display Name: SNS Pistol
WEAPON_SNSPISTOL_MK2		Display Name: SNS Pistol Mk II
WEAPON_VINTAGEPISTOL		Display Name: Vintage Pistol

Machineguns
WEAPON_COMBATMG			Display Name: Combat MG
WEAPON_COMBATMG_MK2		Display Name: Combat MG Mk II
WEAPON_GUSENBERG		Display Name: Gusenberg Sweeper
WEAPON_MG			Display Name: MG

Heavy
WEAPON_GRENADELAUNCHER		Display Name: Grenade Launcher
WEAPON_RAILGUNXM3		Display Name: Railgun
WEAPON_RPG			Display Name: RPG