✅ ISMI 18 lb 1911 Commander Recoil Spring

Keep your Commander-length 1911 running smooth and reliable with the ISMI 18 lb recoil spring. This spring gives consistent slide speed, clean feeding, and long-lasting durability. It works well with standard or full-power ammo. Whether you shoot for duty, carry, or range, your pistol will operate the same way every time.

ISMI makes every spring in the USA using CAD design and aerospace standards. This ensures each spring performs with precision and strength. You can trust your 1911 to run smoothly round after round.

✅ ISMI Recoil Springs – Built for Strength and Reliability

ISMI uses Chrome Silicon wire for maximum durability. Each spring is:

✅ Heat treated to increase strength
✅ Shot peened to reduce surface stress
✅ Fully stress relieved to prevent permanent set

These processes keep the spring’s tension consistent. They reduce wear on your slide and frame. As a result, your pistol cycles smoothly and reliably.

✅ Why Upgrade to an ISMI 18 lb Spring?

Standard springs wear out over time. When this happens, slide speed can vary, feeding may fail, and the pistol can batter the frame. ISMI springs solve these issues. They also handle high-power ammo safely while keeping the slide smooth and predictable.

✅ ISMI Key Features & Benefits

✅ 18 lb recoil spring for Commander-length 1911 pistols
✅ Works with standard and full-power loads
✅ Smooth, reliable slide cycling
✅ Improves feeding, lockup, and timing
✅ Chrome Silicon wire for long life
✅ Heat treated, shot peened, and stress relieved
✅ Made in the USA to aerospace standards
✅ Reduces wear on frame and slide

✅ Applications

• Standard or high-power 1911 ammo

• Duty, carry, and competition pistols

• Replacement for worn springs

• Use with extra-power firing pin springs for best results

• Ideal for gunsmiths and serious shooters

✅ Maintenance & Warranty

Replace springs every 5,000–10,000 rounds. Pair with a proper firing pin spring for best reliability. ISMI covers every spring with a 12-month replacement warranty, even for normal wear.

✅ Material & Construction

✔ Chrome Silicon wire
✔ Heat treated for strength
✔ Shot peened to reduce stress
✔ Fully stress relieved
✔ Made in the USA

✅ Summary

The ISMI 18 lb 1911 Commander Recoil Spring delivers smooth cycling, consistent feeding, and long-term durability. Built to aerospace standards in the USA, it keeps your 1911 reliable, accurate, and ready for duty, carry, or the range.