The Orca project, version 5.3, offers a 3D-printable AR-15 platform using standard printers. Key components like receivers and handguards can be printed in PLA+, but critical parts such as the barrel mount require high-strength filaments like Polycarbonate or Carbon Fiber Nylon for heat resistance. The design incorporates a 2-degree magazine tilt for improved feeding and specific heat management solutions for the barrel and gas tube.
This project details the construction of a 3D printed AR-15, focusing on reducing cost and weight. Key innovations include a clamshell barrel mount, integrated buffer tube and grip, and dovetail takedown pins. While functional for basic use, the PLA+ upper receiver experiences significant accuracy degradation under sustained fire due to heat, highlighting the need for more heat-resistant materials like carbon fiber nylon for critical components.
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