ISMI 1911 Magazine Springs

ISMI magazine springs are wound from certified aerospace spec materials. Manufacturing processes and proprietary design features provide enhanced performance and reliability. ISMI magazine springs are designed for extended use, magazines can be kept loaded for long periods of time with little or no loss of spring pressures. Due to the high coiling stresses of rectangular body springs, you may experience some torsional distortion or minimal loss of free length. Neither of which will negatively affect the functioning of your pistol. By making evolutionary design changes based on feedback from some of the top competitive shooters in the world, we have been able to minimize the effect that these losses have on the reliability and functioning of your magazines.

As with all other ISMI springs, our magazine springs are covered by a 12 month replacement warranty even for failure due to wear.

Please note that not all failure to feed problems are due to bad magazine springs. A good spring can enhance reliability and performance but it may not be able to overcome a dimensionally incorrect magazine body or make up for improper fitting of a barrel or other components.