KCPD-A01 was basic humanoid-shaped droid design which was used in the production of various droid models - both for military and civilian purposes - by different droid manufacturers. Full production ID for this design was droid.assassin_droid.kcpd_a01. Like most humanoid-shaped models, it allowed to install wide array of internal weapons and protective shileds, to complement its abilitiy to use most blasters, rifles and melee weapons.
During the Great Galactic War

Great Galactic War Event Great Galactic War (3681BBY - 3653BBY)

, KCPDs were used as service droids in the Old Galactic Market district on Coruscant, but after the Imperial invasion

Sacking of Coruscant Event Great Galactic War (3681BBY - 3653BBY)

and market's takeover by Migrant Merchant's Guild, many were reprogammed and armed to serve as the Guild's security, patrol and war droids.

Planet	Organization	Modification	Weapon	Notes
Coruscant Coruscant Planet	Migrant Merchants Guild Migrant Merchants' Guild Organization Planetary and Sector	Guild Security Droid	L10.a1.v3 Blaster Pistol L10 Blaster Weapon Blaster pistols	Equipped with missile launcher
		War Droid Sentry		Equipped with shield probe, retractable blades and wrist-mounted laser
		Guild Patrol Droid	L10.a1.v3 Blaster Pistol L10 Blaster Weapon Blaster pistols (x2), L3 Electroblade L3 Electroblade Weapon Melee weapons
		Rogue Worker Droid	H3.a1.v1 Heavy Blaster Rifle H3 Heavy Rifle Weapon Blaster rifles
		Market Service Droid		Repair and shield probes
		Carrier Droid