Glock 3.5 Connector
Glock 3.5# (minus) Connector. Don't settle for imitations. These are factory Glock (factory equipment) 3.5# connectors, not an aftermarket brand.
Works in all models and generations of Glocks except the 42 and 43.
This is the 4.5# connector in current terminology. Years ago they were called 3.5# connectors.