1911 Main Spring
The United Defense 1911 Main Spring is a mil-spec replacement hammer spring for the M1911 platform. It powers the hammer fall that ignites the primer on every shot, making it one of the most important — and most commonly worn — springs in the pistol. Wound from hardened spring steel to the standard 23 lb USGI rating, it drops straight into the mainspring housing of full-size Colt, Government, Commander, and clone 1911s in .45 ACP, .38 Super, 9mm, and 10mm. A smart spare to keep on hand for any 1911 owner, armorer, or competitive shooter.
In stock
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- SKU
- 1911MSH
$6.95
Description
Features
- Mil-Spec Replacement — Direct drop-in replacement for the factory main spring in full-size M1911 and 1911A1 pistols.
- Standard 23 lb Power Rating — Delivers USGI-spec hammer strike force for reliable primer ignition across hardball, defensive, and match loads.
- Hardened Spring Steel — Wound from heat-treated steel wire to resist set, fatigue, and corrosion over thousands of cycles.
- Critical Wear Item — The main spring drives the hammer through every shot, making periodic replacement essential to keep ignition consistent.
- Wide Platform Compatibility — Fits Colt 1911, 1911A1, Government, Commander, and the majority of clones chambered in .45 ACP, .38 Super, 9mm, and 10mm.
- Drops Into the Mainspring Housing — Installs in the standard mainspring housing with no fitting required — pop the housing, swap the spring, reassemble.
- Restores Factory Trigger Feel — Returns a tired pistol to its original hammer tension and trigger pull weight.
- Affordable Spare — Cheap insurance to keep in your range bag, armorer's kit, or 1911 spare-parts stash.
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Customer Reviews
Top customer reviews
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1911 Main SpringPicked one up to keep as a spare. Seems to be very nice quality !!! Very affordable.
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1911 Main SpringBought one of these as a back up replacement for my Springfield. I haven't gotten to the range yet with it to see how it works in my gun, but I installed it and the gun seems to function fine and I'm looking forward to testing it out. If this works for me, it will be a great deal for five dollars. I will update my review after I give it a good work out.
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