springs

Hey guy's does anyone know where I might be able to pickup a few little springs/parts locally? All I need are the, AR-15 Buffer Detent Spring which holds the buffer spring in and the AR-15 Buffer Detent itself. and lastly one of the AR-15 Detent Springs. I found them all online for a whopping...

What store has a good selection of small straight pull springs? I am trying to reduce the trigger pull on my TP-9, but DSA only has standard replacement springs. It is a straight pull spring so if I can just find one roughly the same size with less tension I would like to give it a try.