Detailed 3D Modeler for Firearm Design
Budget: $1,500 – $3,000 AUD
Hello, I am looking for a skilled CAD designer / 3D modeler with experience in firearm engineering or mechanical design to create a highly detailed, 1:1 scale AR-15 model with the following specifications:
✅ Fully detailed 1:1 scale model – The design should be accurate to real-world dimensions.
✅ 1:7 barrel twist rate – The rifling inside the barrel must have the correct 1:7 twist for realism.
✅ Individual parts modeled separately – The model should include every component as separate files, including:
Upper & lower receiver
Bolt carrier group
Charging handle
Barrel with correct rifling
Gas system
Handguard, stock, pistol grip
Fire control group (trigger, hammer, safety, etc.)
Buffer tube and buffer assembly
✅ All springs included – Compression and tension springs (buffer spring, trigger spring, firing pin spring, magazine spring) should be accurately modeled.
✅ STL format required – The final model should be delivered in STL format (for 3D printing), and optionally in STEP, IGES, or SolidWorks if available.
✅ Manufacturing considerations – The model should be designed with realistic tolerances for 3D printing or CNC machining.
Please share any past firearm-related work or CAD modeling experience. Looking for a high-precision, professional model.
List of Springs in an AR-15:
Buffer Spring (Recoil Spring)
Size: 226.12.7 (Length: 226 mm, Diameter: 12.7 mm)
Function: Provides recoil resistance to the bolt carrier group and absorbs the shock from firing.
Action Spring (Firing Pin Spring)
Size: 48.1.5 (Length: 48 mm, Diameter: 1.5 mm)
Function: Ensures the firing pin strikes the primer.
Extractor Spring
Size: 25.2 (Length: 25 mm, Diameter: 2 mm)
Function: Provides tension to the extractor, ensuring it properly ejects a spent cartridge.
Extractor Spring Buffer
Size: 11.5.4.5 (Length: 11.5 mm, Diameter: 4.5 mm)
Function: Protects the extractor spring and reduces wear.
Hammer Spring
Size: 67.3.5 (Length: 67 mm, Diameter: 3.5 mm)
Function: Ensures the hammer strikes the firing pin with enough force to ignite the primer.
Trigger Spring
Size: 33.2 (Length: 33 mm, Diameter: 2 mm)
Function: Provides tension to the trigger mechanism for proper resetting and engagement.
Safety Selector Spring
Size: 35.2 (Length: 35 mm, Diameter: 2 mm)
Function: Tension spring that keeps the safety selector in the safe or fire position.
Takedown Pin Detent Spring
Size: 19.2 (Length: 19 mm, Diameter: 2 mm)
Function: Keeps the takedown pin in place during disassembly.
Pivot Pin Detent Spring
Size: 19.2 (Length: 19 mm, Diameter: 2 mm)
Function: Keeps the pivot pin secured during operation.
Bolt Catch Spring
Size: 33.2 (Length: 33 mm, Diameter: 2 mm)
Function: Provides tension to the bolt catch, ensuring it locks the bolt to the rear when the magazine is empty.
Magazine Catch Spring
Size: 20.1.5 (Length: 20 mm, Diameter: 1.5 mm)
Function: Keeps the magazine catch in place for secure magazine retention.
Buffer Retainer Spring
Size: 19.2 (Length: 19 mm, Diameter: 2 mm)
Function: Keeps the buffer retainer in position inside the lower receiver.
✅ Fully detailed 1:1 scale model – The design should be accurate to real-world dimensions.
✅ 1:7 barrel twist rate – The rifling inside the barrel must have the correct 1:7 twist for realism.
✅ Individual parts modeled separately – The model should include every component as separate files, including:
Upper & lower receiver
Bolt carrier group
Charging handle
Barrel with correct rifling
Gas system
Handguard, stock, pistol grip
Fire control group (trigger, hammer, safety, etc.)
Buffer tube and buffer assembly
✅ All springs included – Compression and tension springs (buffer spring, trigger spring, firing pin spring, magazine spring) should be accurately modeled.
✅ STL format required – The final model should be delivered in STL format (for 3D printing), and optionally in STEP, IGES, or SolidWorks if available.
✅ Manufacturing considerations – The model should be designed with realistic tolerances for 3D printing or CNC machining.
Please share any past firearm-related work or CAD modeling experience. Looking for a high-precision, professional model.
List of Springs in an AR-15:
Buffer Spring (Recoil Spring)
Size: 226.12.7 (Length: 226 mm, Diameter: 12.7 mm)
Function: Provides recoil resistance to the bolt carrier group and absorbs the shock from firing.
Action Spring (Firing Pin Spring)
Size: 48.1.5 (Length: 48 mm, Diameter: 1.5 mm)
Function: Ensures the firing pin strikes the primer.
Extractor Spring
Size: 25.2 (Length: 25 mm, Diameter: 2 mm)
Function: Provides tension to the extractor, ensuring it properly ejects a spent cartridge.
Extractor Spring Buffer
Size: 11.5.4.5 (Length: 11.5 mm, Diameter: 4.5 mm)
Function: Protects the extractor spring and reduces wear.
Hammer Spring
Size: 67.3.5 (Length: 67 mm, Diameter: 3.5 mm)
Function: Ensures the hammer strikes the firing pin with enough force to ignite the primer.
Trigger Spring
Size: 33.2 (Length: 33 mm, Diameter: 2 mm)
Function: Provides tension to the trigger mechanism for proper resetting and engagement.
Safety Selector Spring
Size: 35.2 (Length: 35 mm, Diameter: 2 mm)
Function: Tension spring that keeps the safety selector in the safe or fire position.
Takedown Pin Detent Spring
Size: 19.2 (Length: 19 mm, Diameter: 2 mm)
Function: Keeps the takedown pin in place during disassembly.
Pivot Pin Detent Spring
Size: 19.2 (Length: 19 mm, Diameter: 2 mm)
Function: Keeps the pivot pin secured during operation.
Bolt Catch Spring
Size: 33.2 (Length: 33 mm, Diameter: 2 mm)
Function: Provides tension to the bolt catch, ensuring it locks the bolt to the rear when the magazine is empty.
Magazine Catch Spring
Size: 20.1.5 (Length: 20 mm, Diameter: 1.5 mm)
Function: Keeps the magazine catch in place for secure magazine retention.
Buffer Retainer Spring
Size: 19.2 (Length: 19 mm, Diameter: 2 mm)
Function: Keeps the buffer retainer in position inside the lower receiver.