Download from here: WeaponsPatchv1.5

First of all Thanks to Revolution Team who provide us Masterpiece Edition of GTA Vice City
 
Due to GTA 4 limitations,  Some weapons Like (Katana, Tec 9, Machete, etc) are missing from GTA Vice City The Nextgen Editon. So Finally We start Working to restore all cut/missing weapons

 In this version of the mod, the following features are available:
  Hide contents
• All Weapons in add-on slots
• Improved weapons from Definitive Edition:
• Proper Sounds
• Proper Anims
• Single-Hand Anim for Tec9 and Mac 10
• Classic Sniper Scopes
• Working Flamethrower
• Improved Minigun
• OG Weapons Icon
• Improved Weapons Sounds from Classic-Vice City
• Accurate weapons behavior from Classic-Vice City
• Updated Cheat list
• All Weapons Pickups Available
• Rhino now Shootable
• Now Vigilante Available with New Rhino
• Weapons Corrected in all Missions
 
WeaponsPatch Now compatible with Unofficial Patch v1.2

----Weapons list----
Brass Knuckles ✔
Katana ✔
Machete ✔
Screwdriver ✔
Tec 9 ✔
Uz-I ✔
Stubby Shotgun ✔
Sniper Rifle ✔
Minigun ✔
Flame thrower ✔
Remote Grenade ✔
Grenade Launcher✔

Installation:
Drag and drop all the stuff from the "Game Dir" folder to GTA VC Next Gen Directory
Use SparkIV or OpenIV to Drag all scos and drop it into common/data/cdimages/scripts.img
Use SparkIV or OpenIV to Drag and drop "apc.wft" & "apc.wtd" into pc/models/cdimages/vehicles.img
Don't forget to backup the original one
 
Zolika Patch is recommended. Otherwise, the Remote Grenade and Rhino's Cannons will not work properly
 
If you don't use ZolikaPatch but use FusionFix, it will be enough if these options are in the GTAIV.EFLC.FusionFix configuration files are enabled?
[EPISODICCONTENT] EpisodicVehicles = 1                          // Support for APC and Buzzard and all their abilities in IV and TLaD
EpisodicWeapons = 1                                                              // Support for DSR1, Pipe bomb, Sticky bomb, AA12 explosive shells, P90 vehicle check, Parachute in IV, TLaD and TBoGT
ExplosiveAnnihilator = 1                                                          // Enables explosive rounds on Annihilator, requires episodic weapons
 
Use Simple native Trainer to spawn weapons by following IDs, and if you want to use Zmenu try to find weapons yourself.
 
Weapons Id: 
Brass Knuckles             Episodic 09
Katana                           Episodic 04
Machete                        Episodic 01
Screwdriver                  Episodic 08
Tec 9                             Episodic 12
Uz-I                               Episodic 13
Stubby Shotgun           Episodic 11
Sniper Rifle                   Episodic 15
Minigun                         Episodic 14
Flame Thrower             Episodic 05
Remote Grenade          Episodic 16
Grenade Laucher         Episodic 10
 
Disclaimer
We worked on it from the beginning. Because we didn't want to copy any outdated stuff from Vice City Rage or not use any .Net script to avoid issues
 
Minigun has been moved to Episodic 14 Due to Hunter Minigun's Issue.
 
Rhino is now heavy and shoots cannon. It also updated in PANZER cheat and Missions "Sir Yes Sir" and you can play Vigilante with Rhino
 
We didn't use Gold Uzi animation for Uz-I because we wanted to make them more accurate to OG GTA Vice City. But we included it in the Optional Folder
 
Strongly Recommended to Start a New Game
 
Known Bugs & Solutions:
Random Objects on Pickups (Start a new Game)
Sometimes Rhino sound loads after some seconds. (Use Engine sound fix mod)
 
 
Stuff included in the Optional folder:
 Single Hand Anim for Mac 10
 Classic Weapons Icon 
 Definitive Edition Styled Weapons Icons
 Classic (Bordered) Weapons Icon
 Improved OG Weapons Sounds
 OG Scope for Laser Sniper
 TBoGT Gold uzi Anim for Uz-I

Updated Weapons list in Cheat Codes (make more accurate from GTA Vice City) ✔
Added Proper weapons pickups of these weapons ✔
Corrected Weapons in Missions ✔
Corrected Weapons in Ammu-nations and Phil's Place ✔