Tier 4 Part

Part	Drop from
Optic Scope	Infinity mines Level 1
Polymers	Infinity mines Level 2
Goretex	Infinity mines Level 3
Carbon Polymer	Infinity mines Level 4
Recoil Absorber	Infinity mines Level 5
Cylindrical rotary lock	Infinity mines Level 6
Electric Motor	Vault 12
Delinker Mechanism	The Tunnel
High Tech Gunpowder	Abbey
Auto-Trigger	Area 51‎
Engine	Warehouse‎‎
Semi Trigger	Tanker Basement‎‎
Gun Control Module	The Temple
Microchips	Laboratory X7‎
Mine Parts	Cathedral‎
Capacitors	Mariposa Military Base‎‎
Ceramic Plate	Talchem California HQ‎‎
Kevlar	Glow
Plasma Accelerator	Vault 15‎
Wires	Waterworks‎‎
Plasma Transformer	Slavery Vault‎
Electrical Transformer	Hawthorne Military Base
Steel Plate	Paradise Valley‎
Leather Hide	Ares Rocket Silo
TX-28 Microfusion pack	Ares Rocket Silo
Advanced Polymers	Vault 13
HiFlo Hydraulic Systems	Vault 13
Unique plasma parts	Vault 14
Polycarbonate	Vault 41
Electromagnetic Mechanism	Vault 41
Glass Polymers	Sierra Army Depot
Electric Amplifier	Sierra Army Depot
Enchanced Servomotors	Navarro
Rotary Chamber	Navarro
Advanced Shell	Event Encounter
Carbon Polymer	Lost Signal tier I
T-51b Shell	Lost Signal tier II