The "p" in the part number represents adjustable controls for windage and elevation adjustments on illuminator
NSN 5950-01-465-1679
NSN 5996-01-449-9982
NSN 4140-00-808-0961
NSN 5945-00-998-3688
NSN 5960-00-082-0493
NSN 5985-00-347-9770
NSN 5990-00-513-5328
NSN 6220-01-274-0724
NSN 6220-01-660-1900
NSN 6320-01-247-0898
NSN 5965-01-167-3495
NSN 5998-01-477-5551
Last Updated: 01/03/2025