***( NOT FOR SALE IN CALIFORNIA )***
The MBX “Mega” PCC Competition 6″ Extension Base pad with MBX Custom Spring adds a Maximum capacity of up to 57 rounds.
Designed specifically to fit the Factory Glock 33 round 9mm magazine as well as the ETS long stick Glock style magazine only.
This MBX 6″ Extension will also fit factory Glock standard length magazines but round count will vary depending on the model that you attach it to. You will need cut the supplied 28 coil spring or purchase an MBX 19 coil 20% extra power Glock style spring for maximum realiablity.