POF Roller cam pin. For use with gas piston ARs in .223/5.56 or similar sized BCGs. It can not be installed on DI BCGs due to clearance issues when installing with the gas key.
I converted all of my piston guns back to DI. So it is just sitting in my parts bin with no purpose.
It has been used with about 300 rounds on it.
$20 shipped and pp'd. Firm.