I picked up a LE version Colt 6520 made in 2000. The pivot pin was not a push pin but a solid pin with a retaining screw. The solid pin is the same dia. as a military M16 pivot pin but threaded for a retaining screw kinda like the SP1s. Anybody see this before. The lower receiver is set up to accept a spring and detent and push type pivot pin.
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Colt 6520 pivot pin
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