What i want to see in Fallout is:
Multiple Firing Modes, such as Burst, Auto and Semi Auto while keeping Ammo Switching
Crouch, Prone
In-Game Weapon Modding and Creation (of sort)
Each weapon should be made of these parts: Main Body, Barrel, Barrel Grip, Ammo, Sights and Stock
MAIN BODY
Chamber: Ammo Width
Magazine: Ammo Capacity
Recoil Springs: Max Firing Rate
Firing Mode Switch: Amount of Firing Modes the Weapon has
BARREL
Barrel Width: Ammo Width
Barrel Length: Max Accuracy
Barrel End: Flash Hider, Suppressor or Silencer Attachment
BARREL GRIP
Grip: Max Recoil Reduction, Max Accuracy
End Grip: Like GL or Flashlight/Laser)
SIGHTS
Sights: Max Accuracy, Player Convenience
Scope: Max Accuracy, Player Convenience
STOCK
Stock: Recoil Reduction
Shoulder Mat: Recoil Reduction
AMMO
Lead: Damage & Other Effects
Propellant: Weapon Damage & Durability Reduction
Case: Ammo Width
The player should be able to change/mod these parts or even "create" new ones if "Repair" and "Science" is high enough.
He can change them from certain other weapons.
For example take a barrel from a sniper and add it to an assault carbine or add a scope from a sniper to a smg
He can mod some of them from Schematics Bench or Reloading Bench.
For example shorten a barrel, change the propellant explosive or adding a flashlight or laser on a GL so the weapon can have both GL and FL or Laser, adding zoom too a scope.
He can create "new" weapon or mods from Schematics/Reloading Bench or a new bench/machine.
Re-make a firing mode switch mod and add 3-4 firing modes (Semi-Auto, 3 Round Burst, 5 Round Burst, Auto).
Re-make a gun from scratch (if possible) by combining various pre-made models of parts (creating player's ultimate weapon visualy) and by picking various pre-made options, such as up to 12 rps. Also he should create new magazines: Quick Reloading, Drum Magazines (100 rounds), Box Magazines (200 rounds), Reduced Sized Box Magazines (65~80 rounds) as well as create propellant explosive and new lead heads using schematics.
In any case i want (and probably not just me) 20 mod weapons. What do you think?