Droid Chassis Upgrades

58 upgrades across three categories. Plating — chassis armor, AC bonuses, damage resistance, regeneration. Armament — integrated wrist blasters, vibroclaws, flamethrowers, grenade launchers. Utility — servomotors, cognition modules, sensors, holoprojectors, stim-injectors, cloaking fields. See Playing as a Droid for how chassis upgrades replace worn armor and biological healing.

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Plating · 15

Name	Compatibility	Cost	Recommended	Effect
Bronzium Shell	all chassis	1,500 cr	Lv 1+	Legacy alloy used on older destroyer-class droids.
Plasteel Plating	all chassis	600 cr	Lv 1+	Mass-produced lightweight chassis reinforcement.
Durasteel Plating I	all chassis	2,000 cr	Lv 3+	Standard mass-produced military-grade plating.
Duravlex Shell	all chassis	2,500 cr	Lv 3+	Damage Resistance 2 vs Fire damage. Heat-resistant alloy used on smelter and mining droids.
Durasteel Plating II	all chassis	5,000 cr	Lv 6+	Heavy military durasteel.
Laminanium Plating I	all chassis	7,000 cr	Lv 6+	Regeneration 1. Tendrando self-repairing qellan alloy.
Quadanium Plating	all chassis	6,000 cr	Lv 6+	Damage Resistance 2 vs Energy damage. Battle-droid-grade alloy.
Durasteel Plating III	all chassis	11,000 cr	Lv 9+	Heaviest mass-produced durasteel.
Laminanium Plating II	all chassis	16,000 cr	Lv 10+	Regeneration 2.
Duranium Plating	all chassis	20,000 cr	Lv 11+	Heavy-duty industrial chassis reinforcement.
Laminanium Plating III	all chassis	32,000 cr	Lv 14+	Regeneration 3.
Cortosis-Durasteel Alloy✦ Legendary	all chassis	14,000 cr	Lv 8+	Damage Resistance 3 vs Energy damage. Lightsabers do not gain critical-hit bonuses against you.
Phrik Alloy Plating✦ Legendary	all chassis	18,000 cr	Lv 11+	Damage Resistance 3 vs Bludgeoning, Piercing, and Slashing damage. Lightsabers do not gain critical-hit bonuses against you.
Neutronium Plating✦ Legendary	all chassis	36,000 cr	Lv 13+	Damage Resistance 3 vs Bludgeoning, Piercing, and Slashing damage. Assassin-droid grade; extreme density.
Beskar Plating✦ Legendary	all chassis	42,000 cr	Lv 15+	Damage Resistance 5 vs Bludgeoning, Piercing, and Slashing damage. Lightsabers do not gain critical-hit bonuses against you. Mandalorian iron.

Armament · 16

Name	Compatibility	Cost	Recommended	Effect
Charge Arm	all chassis	800 cr	Lv 1+	Chassis-mounted electric prod. 5 ft melee, 1d4 Energy + Stun on a failed CON save. Short-range defensive arm.
Electro-Shock Prod	all chassis	1,000 cr	Lv 1+	Astromech defensive prod. 5 ft melee, 1d4 Energy + Stun on a failed CON save. Non-lethal — cannot reduce a target below 1 HP.
Integrated Blowtorch	all chassis	500 cr	Lv 1+	Mounts a Blowtorch on your chassis. 5 ft range, 1d6 Fire damage. Industrial cutting tool, also effective vs droids in close combat.
Wrist Blaster Mk I	all chassis	1,500 cr	Lv 1+	Standard chassis-mounted blaster. 50 ft range, 1d8 Energy + Stun setting.
Vibroclaw Mk I	all chassis	1,200 cr	Lv 2+	Retractable claw integrated into a droid limb. 5 ft melee, 1d6 Slashing, finesse.
Mini Grenade Launcher	all chassis	3,000 cr	Lv 4+	Fires energy concussion grenades. 20 ft range, 2d6 Bludgeoning + Energy in a 10-ft (2x2) blast radius. DEX save halves. Limited ammo: 3 charges, recharge after a Short Rest.
Sonic Stunner Mk I	all chassis	2,500 cr	Lv 4+	Cone-shaped sonic blast. 5-ft cone at 30 ft range, 1d8 Sonic + Stun on failed CON save. Save halves damage and negates Stun.
Buzz Saw Arm	all chassis	3,000 cr	Lv 5+	Industrial buzz saw. 5 ft melee, 2d4 Slashing + 1 bleed at the start of target's next turn. B2 buzzsaw droid signature.
Integrated Flamethrower	all chassis	4,500 cr	Lv 6+	Hidden internal flamethrower. 10-ft cone at 20 ft range, 2d6 Fire (DEX save halves). Limited ammo: 4 charges, recharge after a Short Rest.
Wrist Blaster Mk II	all chassis	4,500 cr	Lv 6+	Improved chassis-mounted blaster. 50 ft range, 1d10 Energy + Stun setting.
Ion Projector	all chassis	5,500 cr	Lv 7+	Anti-droid weapon. 50 ft range, 2d8 Ion damage; +2d6 Ion vs droids and electronics. Ion damage functions as Stun damage to other droids.
Vibroclaw Mk II	all chassis	6,000 cr	Lv 8+	Reinforced retractable claw with vibro-edge. 5 ft melee, 1d10 Slashing, finesse.
Grenade Launcher	all chassis	8,500 cr	Lv 9+	Full-size energy-grenade launcher. 50 ft range, 3d6 Bludgeoning + Energy in a 20-ft (4x4) blast radius. DEX save halves. Limited ammo: 5 charges, recharge after a Short Rest.
Sonic Stunner Mk II	all chassis	7,000 cr	Lv 9+	Improved cone-shaped sonic blast. 10-ft cone at 30 ft range, 1d12 Sonic + Stun on failed CON save.
Wrist Rocket Launcher	all chassis	9,000 cr	Lv 10+	Single-rocket chassis launcher. 80 ft range, 3d8 Slashing in a 10-ft blast radius. DEX save halves. Limited ammo: 2 charges, recharge after a Short Rest. B2 SBD signature ordnance.
Heavy Repeating Wrist Cannon	all chassis	14,000 cr	Lv 12+	IG-series heavy repeater. 60 ft range, 2d8 Energy + Stun. Autofire option: target a 10-ft square; all creatures take 2d8 (DEX save halves).

Utility · 27

Name	Compatibility	Cost	Recommended	Effect
Cognition Module Mk I	all chassis	2,500 cr	Lv 1+	+1 to Intelligence.
Servomotor Mk I	all chassis	2,500 cr	Lv 1+	+1 to Strength.
Stim-Injector Mk I	all chassis	2,000 cr	Lv 1+	As a Bonus Action, heal a creature within 5 ft (self or ally) for 1d6 + Proficiency Bonus HP. Limited use: 1 per Long Rest. (BD-Series Supporter Droid ships with this baseline.)
Tool Mount: Mechanic's Toolkit	all chassis	1,200 cr	Lv 1+	Built-in Mechanic's Toolkit — tools always at hand, no item-interaction needed to deploy. Functions identically to a hand-held Mechanic's Toolkit.
Magnetic Footpads	all chassis	1,500 cr	Lv 2+	Climb speed equal to your walking speed on metal surfaces. Advantage on saves to resist being shoved or knocked prone while standing on a metallic surface.
Energy Shield Mk I	all chassis	2,000 cr	Lv 4+	+5 temporary HP that depletes before your regular HP. Recovers after a Short Rest.
Hydraulic Joints Mk I	all chassis	3,000 cr	Lv 4+	+1 to Dexterity.
Infrared Vision Module	all chassis	1,800 cr	Lv 4+	You gain darkvision out to 60 feet.
Sensor Suite	all chassis	2,500 cr	Lv 4+	Advantage on Perception checks.
Holographic Projector	all chassis	4,000 cr	Lv 5+	As an Action, project a 1-minute disguise of any humanoid you have seen. Visual only — does not change your size or your voice. Limited use: 1 per Short Rest.
Insight Processor	all chassis	4,000 cr	Lv 5+	+1 to Wisdom. Tactical pattern-recognition routine.
Translator Unit	all chassis	3,000 cr	Lv 5+	You understand all common languages and can read any common script. For uncommon or rare languages, make a DC 12 INT (Investigation) check to comprehend. (Already granted by RA-7 Protocol Droid as a species trait.)
Cognition Module Mk II	all chassis	6,000 cr	Lv 6+	+2 to Intelligence.
Servomotor Mk II	all chassis	6,000 cr	Lv 6+	+2 to Strength.
Stim-Injector Mk II	all chassis	5,000 cr	Lv 7+	As a Bonus Action, heal a creature within 5 ft for 2d6 + Proficiency Bonus HP. Limited use: 1 per Long Rest.
Energy Shield Mk II	all chassis	5,500 cr	Lv 8+	+10 temporary HP that depletes before your regular HP. Recovers after a Short Rest.
Hydraulic Joints Mk II	all chassis	8,000 cr	Lv 8+	+2 to Dexterity.
Magnetic Stabilizer	all chassis	4,500 cr	Lv 8+	Advantage on checks and saves to resist being shoved, tripped, knocked prone, or grappled.
Targeting Computer	all chassis	7,000 cr	Lv 9+	Once per turn, you may take a single attack with Advantage. Targeting solutions reset on a Short Rest.
Self-Repair Diagnostics	all chassis	8,000 cr	Lv 10+	As a Bonus Action, regain 1d6 + Proficiency Bonus HP. Limited use: 1 per Short Rest. Onboard repair routine — not biological healing, so it functions on droids despite §13.7.
Servomotor Mk III	all chassis	12,000 cr	Lv 10+	+3 to Strength.
Repulsorlift Pack	all chassis	10,000 cr	Lv 11+	Fly speed 30 ft for up to 10 minutes per use. Limited charges: 2, recharge after a Short Rest.
Tactical Battle Computer	all chassis	12,000 cr	Lv 11+	+2 to Initiative rolls. Advantage on Knowledge: Tactics checks.
Cognition Module Mk III	all chassis	14,000 cr	Lv 12+	+3 to Intelligence.
Energy Shield Mk III	all chassis	12,000 cr	Lv 12+	+15 temporary HP that depletes before your regular HP. Recovers after a Short Rest.
Stim-Injector Mk III	all chassis	12,000 cr	Lv 13+	As a Bonus Action, heal a creature within 5 ft for 3d6 + Proficiency Bonus HP. Limited use: 1 per Long Rest.
Cloaking Field✦ Legendary	all chassis	25,000 cr	Lv 14+	As an Action, become Invisible for up to 1 minute (concentration). Limited use: 1 per Long Rest.