Magazine Spring - 9mm, .40, .357 .45 GAP G19,G23,G26,G27,G29,G32,G33,G38,G39 (9-coil spring)(Including Gen4, Gen5)
Magazine Spring - .45 Auto G30 (9-coil spring) - use only in older mags
factory-supplied with 3955 marked followers
 
NOTE* These springs are actual factory glock part number 2429 which was replaced by 33509 though they should be forwards compatible with all magazines listed it is the responsibility of the buyer to ensure compatibility with their chosen magazine. 
 
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