Gunshop

 repair/fix <weapon> -- Attempts to unjam a jammed firearm.
 repair/fix <component> -- Attempts to repair a damaged weapon component.
 install <accessory> on <weapon> -- Attempts to install the chosen accessory on the weapon. 
     Requires the accessory is compatible and that no conflicting accessories are already installed.
 uninstall <accessory> on <weapon> -- Attempts to uninstall the chosen accessory from the weapon.
 
 complete <weapon> -- Finishes the process of constructing a weapon from scratch.
 breakdown -- Attempts to dismantle a weapon into its component parts.

Gunshops may be upgraded with better tools.