You can get "Gun Maintenance" perk at level 2+ which allows you to disassemble your gunpowder and explosives weapons for useful parts. At Repair 100, each spare part restore 20% of maximum durability of weapon that can use this spare parts. You can use spare parts to assemble a new weapon for you as well if your Guns or Explosives skill level is high enough.

• Revolvers give you "Spare Parts: Revolver"
• Handguns and SMGs give you "Spare Parts: Handgun"
• Rifles and shotguns give you "Spare Parts: Rifle"
• Shotguns give you "Spare Parts: Shotgun"
• Miniguns give you "Spare Parts: Minigun"
• Automatic weapons additionally give you "Spare Parts: Automatic"
• Scoped weapons additionally give you "Spare Parts: Optics"
  

• Grenades and mines give you "Spare Parts: Fuse"
• Explosives give you "Spare Parts: Explosives"
• Large Launchers give you "Spare Parts: Missile Launcher"
• Greande Launchers give you "Spare Parts: Grenade Launcher"
  

Base Game and Story DLCs (DM, HH, OWB and LR) weapons are covered. GRA is currently not supported (aside possibility to fix weapons that use the same repair lists). Be careful, because unique weapons can be disassembled as well.

You can create modifications for your weapons if you get "Gun Smith" Perk, which requires "Gun Maintenance" Perk. Currently all modifications that could be used by affected weapons are supported. GRA weapons are supported and put into separate file (in case someone doesn't have this DLC).

All items were added to their respective FormLists through script. It should be compatible to any mod.

Q: How to get this Perk?
A: If you want to test this Perk, you can just use console to give your character it. Just type "player.addperk XX000ADF" (where XX is load order of this mod). You can get it as normal Perk during your level up as well.

P.S.
You can check my other mods I developed as part of my Scavenger Wastelander:

• Armor Padding
  

• CQC Maintenance
  

• Energy Maintenance