S-80 Colts with BoMar style adj rear sight
HD-007 Extreme Service Rear Sight family for current production Colt Gold Cup and Special Combat Government Model pistols.
Extreme Service Rear Sight, plain black
Night Sight -w- single lamp for "Over/Under" pattern
Night Sight -w- 2 lamps for 3 dot pattern
Loctite 262 thread locking coumpound
AKA - The truth about sight heights!