Achieve a new level of smooth reliability in your 1911 Commander with the ISMI 18 lb. flat wire recoil spring. As the factory standard weight for most Commander models, this spring is the definitive choice for ensuring flawless function with full-power defensive ammunition. The advanced flat wire design provides a noticeably smoother compression feel and an exceptionally long service life, making it the ultimate upgrade for any duty or carry pistol. The ISMI Advantage: Flat Wire Technology ISMI's flat wire recoil springs offer a distinct performance advantage over traditional round wire springs, making them a favorite of custom builders and serious shooters.
Smoother Recoil Impulse: The flat wire design compresses more linearly than round wire, resulting in a smoother, less "snappy" felt recoil that helps keep your sights on target during rapid fire. Exceptional Durability: Crafted from certified aerospace-spec chrome silicon alloy steel, these flat wire springs are rated for an incredible service life, resisting wear and taking a "set" far longer than any music wire spring. Made in the USA: Proudly manufactured in the United States by ISMI, the top choice for high-performance firearm springs in nearly every shooting discipline.
Application & Tuning Guide An 18 lb. flat wire recoil spring matches the factory standard weight for most 1911 Commander models in .45 ACP. It provides the ideal balance for controlling slide velocity with powerful ammunition.
Full-Power & +P Ammunition: This is the correct spring weight for reliably cycling full-power 230gr "hardball" and all +P defensive ammunition. It prevents excessive slide velocity, protecting your pistol's frame from battering. Duty & Self-Defense Reliability: If you carry your 1911 for self-defense, the 18 lb. spring provides the positive, authoritative return-to-battery that is critical for life-or-death reliability. Factory-Spec Performance, Premium Feel: Get the proven reliability of the factory-standard weight combined with the smoother, more refined feel of a premium flat wire spring.
Technical Specifications
Manufacturer ISMI (International Spring Manufacturing, Inc.)
Fitment 1911 Commander (4.25" Barrel) & Compact Models
Spring Weight 18 lbs. (Factory Standard)
Material Chrome Silicon Alloy Steel
Wire Type Flat Wire
1911 Recoil Spring FAQ
What's the difference between a flat wire and a round wire spring?
Flat wire springs, like this one, compress more linearly, which can result in a smoother felt recoil impulse. They also tend to have a longer service life. Round wire springs are the traditional standard and offer a more conventional compression feel. The choice often comes down to the shooter's preference for recoil feel.
Do I need a special guide rod for a flat wire spring?
Yes, in most cases, a flat wire recoil spring requires a guide rod with a slightly smaller diameter than a standard guide rod to function correctly. Please ensure your guide rod is compatible with flat wire springs.
Location:
52 BELMONT AVE,
QUAKERTOWN
Pennsylvania
18951
