I have a complete upper, it is the SP1 style/early AR15/early M16 with no forward assist. But it does have the small pivot pin. Has a colt lightweight 1/12 twist 20 inch barrel with triangle handguards. Only downfall is that it does not have a bayonet lug, it has been removed. Anyhow, upper is complete (charging handle bolt assy sights cover)
Asking $325 shipped if your interested.
Pic can be available.