The WWSD2020 project's KP-15 polymer lower receiver is nearing production, with shipping estimated for July. Development faced delays due to mold complexity and COVID-19 impacting subcontractors. The design adapts aluminum concepts for polymer, reinforcing critical areas like the fire control group and buttstock. Manufacturing utilizes injection molding and vibration welding for efficiency, achieving a 60-second cycle time compared to machining aluminum.
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