The MBX Custom Springs for Glock Style MBX Extensions are custom wound Wolff premium spring that are designed for glock style follower and MBX follower. Produces maximum realiablity and feeding when used in conjunction with MBX extensions.
MBX 20% extra power Glock style spring for factory follower for based extension 5-6rds the ultimate upgrade for 9mm, .40 S&W, and .45ACP.
• 140mm Spring extra power extension base pad
• 19 Coil Spring for Standard PCC extension base pad
• 24 Coil Spring for Mini 47 extension base pad
• 28 Coil Spring for Mega 57 extension base pad