GS magazine replacement springs for mags with factory or aftermarket +2 and +4/5 extensions. These are necessary to support proper feeding with increased ammo capacity.
Glocks 17/19X/22/31/45/47 with GS Double Diamond Extension use a 12-coil spring. Option 17
Glocks 19/23/32/49 with GS Double Diamond Extensions use a 11-coil spring. Option 19
Double Diamond +5/4 Magazine Extensions
