Enhance your 1911 with ISMI's premium mainspring
The 1911 MAINSPRING, ISMI 19 LB. S/S SPRING, 5-PAK is expertly designed for maximum consistency and reliability, making it an essential upgrade for your firearm.
Product Description
Crafted using CAD technology and built to aerospace specifications, this mainspring is made from either chrome silicon or stainless steel, ensuring corrosion resistance and maximum durability. The spring undergoes a rigorous process including heat treatment, shot peening, and full stress relief to minimize spring set, providing you with reliable performance.
The 1911 AUTO MAINSPRING is available in two popular rates: 19 lb. and 17 lb.. These options allow for a lighter, more consistent trigger pull while ensuring reliable ignition every time.
Specifications
- Material: Chrome silicon or stainless steel round wire
- Material: Chrome vanadium flat wire
Upgrade your 1911 with ISMI's mainspring for a noticeable improvement in performance and reliability.