An AR-15 pivot pin take down spring is a small, coiled spring that provides tension for the pivot pin and takedown pin, allowing them to lock securely in place and enabling easy disassembly of the rifle. It works with AR-15 lower receivers, pivot pins, takedown pins, detents, and lower parts kits. This spring is essential for proper function and secure assembly of the upper and lower receivers in all standard AR-15 builds and repairs.
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