Colt 6520 pivot pin

[RDS]

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.

[m14brian]

Never seen this but then again we don't see hardly any Colts out here, I thought they all had the wrong size post ban pins by then.
m14brian