Evolution Gun Works ISMI 1911 Mainspring (Hammer) 19 lb - 10641

Upgrade the reliability and performance of your 1911 with the Evolution Gun Works ISMI 1911 Mainspring (Hammer) 19 lb. This premium hammer spring delivers consistent energy transfer for dependable ignition across a wide range of ammunition and conditions, making it an essential upgrade for competition shooters, duty users, and enthusiasts seeking enhanced durability.

Key Features

• Advanced Stainless Alloy Construction – Crafted from high-grade silicone chrome stainless alloy instead of traditional music wire for superior corrosion resistance and longevity.
• Precision Engineering Process – Each spring undergoes heat treating, shot peening, and stress relieving to maximize fatigue resistance and ensure uniform performance over tens of thousands of cycles.
• Optimized 19 lb Rating – Provides balanced hammer energy for reliable primer strikes while maintaining smooth operation and consistent trigger feel in full-size and commander 1911 platforms.
• Proven Endurance – Independent testing confirms these springs exceed 100,000 compression cycles without failure, far outlasting conventional options.

Specifications

• Weight Rating: 19 lb
• Material: Stainless alloy (silicone chrome)
• Finish/Process: Heat treated, shot peened, stress relieved
• Compatibility: 1911 and similar platforms (Government, Commander models)
• Physical Dimensions (packaged): Length 5.748 in, Width 3.268 in, Height 0.039 in
• Weight: 0.176 lb

Why Choose This Product

Traditional mainsprings made from music wire can weaken or corrode over time, leading to light strikes or inconsistent ignition. The ISMI 19 lb mainspring addresses these pain points with modern materials and processing that deliver reliable, long-lasting performance. Whether for range use, carry, or competition, it ensures your 1911 functions flawlessly without unnecessary trigger pull weight increases.

Invest in proven reliability for your 1911 today and experience smoother, more consistent operation from the first shot.