CUSTOMIZING
To customize the general settings go to police_armory_locker/lua/armory_locker/shared/armory_locker_config.lua
To customize the lockpick swep that gets added to DarkRP go to police_armory_locker/lua/armory_locker/shared/armory_locker_darkrpadds.lua
There are over 20 different configuration options in the general settings. I can add any configuration you would like as well. Please just submit a support ticket with your request, and I will see if it's possible.
Additionally a large selection of M9K weapons are added to the police armory settings by default. A selection of ammo types and health/armor items are also added by default.
Default Config
CH_Armory_Locker.Config.WeaponsArmoryEnabled = true -- Should the weapon armory for police jobs be enabled or not? true/false option.
CH_Armory_Locker.Config.RetrieveCooldown = 5 -- Amount of minutes between being able to retrieve a weapon from the police armory as a government official.
CH_Armory_Locker.Config.PoliceKillRobberReward = 1250 -- Amount of money police officers get when killing someone that is lockpicking the armory.
CH_Armory_Locker.Config.KillRobberReward = 250 -- Amount of money anyone else get when killing someone that is lockpicking the armory.

-- Lockpicking Config
CH_Armory_Locker.Config.LockpickTime = 15 -- Amount of seconds to lockpick the armory.
CH_Armory_Locker.Config.LockpickCooldown = 60 -- Amount of seconds after having lockpicked a door, before being able to lockpick another door.
CH_Armory_Locker.Config.DoorCooldown = 120 -- Amount of seconds a door is on a cooldown after being lockpicked. The above config still applies for the individual user.
CH_Armory_Locker.Config.NotifyPolice = true -- Should police jobs be notified when someone has lockpicked the armory and leaves?

-- Display 3D2D Config
CH_Armory_Locker.Config.DisplayHeaderText = true -- Should the text above the armory be displayed?
CH_Armory_Locker.Config.HeaderText = "Police Armory" -- Header text above armory/locker.
CH_Armory_Locker.Config.DistanceToHeader = 1000 -- Distance between player and police locker before the title appears.
CH_Armory_Locker.Config.DistanceToIcons = 500 -- Distance before lockpick/cooldown icons appear.

CH_Armory_Locker.Design.ArmoryHeaderColor = Color( 48, 151, 209, 255 ) -- Header text color (gmodstore blue color)
CH_Armory_Locker.Design.ArmoryHeaderBoarder = Color( 0, 0, 0, 255 ) -- Header text boarder color

CH_Armory_Locker.Config.UseJobRestrictions = true -- Should the restriction system be enabled?
CH_Armory_Locker.Config.HideRestrictedItems = false -- Enable this if you want to hide items that are restricted to another job than the players.

Team Configuration
CH_Armory_Locker.Config.GovernmentTeams = { -- These are your government teams.
"Police Officer",
"Police Chief",
"Secret Service",
"FBI Agent",
"S.W.A.T",
"S.W.A.T Sniper",
"Vault Guard",
"Mayor" -- THE LAST LINE SHOULD NOT HAVE A COMMA AT THE END. BE AWARE OF THIS WHEN EDITING THIS!
}

CH_Armory_Locker.Config.AllowedTeams = { -- These are the teams that are allowed to rob the armory.
"Citizen",
"Gangster",
"Mob boss",
"Gun Dealer",
"Medic",
"Hobo"
}

CH_Armory_Locker.Config.RequiredTeams = { -- Gov teams that count towards the CH_Armory_Locker.Config.RequiredGovTeams.
"Police Officer",
"Police Chief",
"Sheriff",
"FBI Agent",
"S.W.A.T",
"S.W.A.T Sniper"
}

Here's an example of how a weapon/item is made for the armory.
{
Weapon = "m9k_ak47",
Name = "AK47 Rifle",
Desc = "Officially known as the Avtomat Kalashnikova is an assault rifle, developed in the Soviet Union.",
EntType = "weapon",
Model = "models/weapons/w_ak47_m9k.mdl",
AmmoType = "m9k_ammo_ar2",
AmmoAmt = 60 
},

Restricting item example
CH_Armory_Locker.TeamCategories[ "m9k_ak47" ] = { "Police Chief", "SWAT", "Secret Service", "Another Job Name" }