In the “Glock Options Website”, if you go to the Connectors page, they list a “~ 2.0 kg / 4.5 lb” connector in lieu of the 3.5# connector.
I don’t remember them mentioning anything about this in the Glock Armorer’s Course I took last year for recertification. Does anyone know if this is a typo? Or is it a replacement for the 3.5# connector for liability reasons?