need your help/advice for a moment: i saw different slide lock springs, some with longer arms: http://www.midwayusa.com/product/569501/glock-slide-lock-spring-glock-17-20-21-21sf-22-31-34-35-37 some with shorter ones: http://www.midwayusa.com/product/987216/glock-slide-lock-spring-glock-19-23-32-38 midway says they are for different modells, like fullsize (the larger ones) and compact (the smaller ones). i could swear that in my gen.3 G17 and gen. 3 G19 are exactly the same springs, the smaller ones. i always thought the larger ones are for gen. 4 glocks and not gen. 3 glocks?! does glock have different slide lock springs from gen. 3 to gen. 4 glocks or from fullsize to compact modells or both? how do their springs differ and which one would be the right one for a gen. 3 G17 and a gen. 3 G19? thanks buddies can Wanna kill these ads? We can help!