Most GLOCK pistols are fitted at the factory with the 5lb connector. In this way the trigger characteristics are optimally matched to the needs of mos .. more info
The 3,5 kg / 8.0 lb connector is marked with a (+). This is the spring for users appreciating hard "dry" trigger action. It is also characterized by a .. more info
Factory Glock 3.5 LB connector, this is the Glock OEM factory Connector 3.5 LB "minus" (marked "-") fits all models comes stock on most G17L, G24, G34 .. more info