• Compatible Magazines - 9MM / .40 S&W / .380 ACP / .357 Sig / 10mm / .45 ACP • Stainless steel anti corrosion heat treated springs • Made to the same dimensions and tolerances as a standard factory oem Glock 30/33rd magazine spring, ensuring best value and performance • 30/33 round length spring can also be used in magazines that require a spring longer than 30/33 rounds (Like the Kriss Vector 40rd magazines) by using a magazine spring spacer to make up for the empty space.
