The Kimber Ultra Recoil Spring Assembly (brand part number 4000465) is a complete, drop-in replacement recoil spring built specifically for Kimber’s 3-inch Ultra model 1911s chambered in .45 ACP or .40 S&W. Recoil springs wear out with round count and lose the tension needed to cycle the slide reliably, so a fresh factory-correct assembly is cheap insurance against a sluggish or short-stroking pistol. Because it’s sized specifically for the 3-inch Ultra frame rather than a full-size 1911, it restores the correct spring rate for that shorter slide travel instead of forcing a compact gun to run a full-size spring. Regular maintenance like this keeps a carry-length 1911 running exactly like it did out of the box.

Key Specifications

• Built for Kimber Ultra 3-inch model 1911s.
• Sized specifically for the 3-inch slide length.
• Fits pistols chambered in .45 ACP.
• Fits pistols chambered in .40 S&W.
• Installs as a complete drop-in replacement assembly.
• Weighs approximately 0.17 lb.

Frequently Asked Questions

What Kimber models does this fit? The 3-inch Ultra models chambered in .45 ACP or .40 S&W.

Is this a full replacement assembly? Yes, it’s a complete drop-in recoil spring assembly.

Buy the Kimber Ultra Recoil Spring Assembly – 3 Inch, .45 ACP/.40 S&W

Keep your Ultra cycling like new with a factory-correct spring assembly. Order it from our Kimber lineup, part of our 1911 accessories and parts selection, at our Lubbock, Texas gun shop for fast, direct shipping.