Wolff Extra Power Magazine Springs are used when magazine reliability is critical or when original factory springs have lost their tension. These extra power springs put more pressure on the follower, presenting the cartridge to the slide with more force.
Glock 17, 17 L and 34 magazines of 17 and 19 rounds
Glock 20, 21, 22 , 31, 34 and 35 magazines of 15 rounds. Notes:
Use of this spring may require a slightly higher power recoil spring to overcome the additional tension of the top cartridge
pressing on the pistol's slide.
Also recommended when using extra power recoil springs.
Installation requires disassembly and reassembly of the magazine.
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