Tier 4 Part

Part	Drop from	Armor upgrade	Weapon upgrade
Optic Scope	Infinity mines Level 1	N/A	Scoped
Polymers	Infinity mines Level 2	Shock Protection	N/A
Goretex	Infinity mines Level 3	Firegecko's Enhancement	N/A
Carbon Polymer	Infinity mines Level 4	Regeneration	N/A
Recoil Absorber	Infinity mines Level 5	Laser Reflector	N/A
Cylindrical Rotary Lock	Infinity mines Level 6	N/A	Bonus Ranged Damage
Electric Motor	Vault 12	N/A	Bonus Max Damage
Delinker Mechanism	The Tunnel	N/A	Bonus Attack Speed
High Tech Gunpowder	Abbey	N/A	N/A
Auto-Trigger	Area 51‎	N/A	Killing Spree
Engine	Warehouse‎‎	Mirror System	N/A
Semi Trigger	Tanker Basement‎‎	N/A	Fast Trigger
Gun Control Module	The Temple	N/A	Destroyer
Microchips	Laboratory X7‎	Utility ; Heavy Stonewall	N/A
Mine Parts	Cathedral‎	N/A	N/A
Capacitors	Mariposa Military Base‎‎	N/A	Smasher!
Ceramic Plate	Talchem California HQ‎‎	Fill the gaps	N/A
Kevlar	Glow	Heavy	N/A
Plasma Accelerator	Vault 15‎	Defensive Belt	Slayer
Wires	Waterworks‎‎	N/A	Penetrate
Plasma Transformer	Slavery Vault‎	Bonus Move ; Speed Mechanism	N/A
Electrical Transformer	Hawthorne Military Base	N/A	More Critical
Steel Plate	Paradise Valley‎	Gain Luck	Spiked
Leather Hide	Ares Rocket Silo	Cured	N/A
TX-28 Microfusion Pack	Ares Rocket Silo	Special force bonus	N/A
Advanced Polymers	Vault 13	Gain Strength ; Gain Endurance	N/A
HiFlo Hydraulic Systems	Vault 13	Tesla Addition	Poisoned
Unique Plasma Parts	Vault 14	N/A	Better Critical
Polycarbonate	Vault 41	Gain Intelligence ; Gain Agility	N/A
Electromagnetic Mechanism	Vault 41	N/A	Long range
Glass Polymers	Sierra Army Depot	Gain Perception ; Gain Charisma	N/A
Electric Amplifier	Sierra Army Depot	Sneaky	N/A
Enchanced Servomotors	Navarro	Anti-thermal System	N/A
Rotary Chamber	Navarro	Iron Skin	Chip Shot
Advanced Shell	Event Encounter	Defence Enhancement	N/A
Carbon Polymer Barrels	Lost Signal tier I	Penetration Protection	Bonus Min Damage
T-51b Shell	Lost Signal tier II	Advanced Plate	N/A