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External Forend Weights by ISMI Spring Sales are designed for M-Lok chassis and forends
****GEN 4 Pistols will require Glock adapter****
ISMI rod is non captured with a Black Oxide finish
This uncaptured design allows the shooter to dis-assemble the guide rod for spring replacement
Glock 19/23 Magazine Spring Hellcat External Forend Weights by ISMIManufactured of Chrome Silicon alloy. These mag springs are designed to take less initial set in order to provide greater load and longevity to ensure reliable ammo feeding. This 10coil mag spring is for use in standard capacity 19 23 models and will work with most plus 1 and 2 extensions. Part#: GLC
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