Nowlin 19.5 lb Mainspring, Government

The Nowlin 19.5 lb Mainspring for Government-frame 1911 pistols (Nowlin part no. 252) is a replacement mainspring rated to a specific 19.5-pound weight, giving gunsmiths and builders a known, consistent starting point when tuning hammer fall energy and overall trigger feel. Mainspring weight affects both how hard the hammer falls to ignite the primer and how much resistance the shooter feels through the grip safety and trigger during the pull, so choosing a specific known weight rather than an unmarked factory spring lets a builder tune ignition reliability against trigger feel deliberately. Nowlin manufactures its own precision 1911 parts rather than reselling generic components, and this spring is built to the Government-frame mainspring housing length. This is a straightforward part to swap during a trigger job or reliability rebuild.

Key Specifications

• It is rated at 19.5 pounds of spring weight.
• It is sized for the Government-frame mainspring housing.

Frequently Asked Questions

Why does mainspring weight matter? It affects both how hard the hammer falls to ignite the primer and how much resistance you feel through the grip safety and trigger during the pull, so a known weight lets you tune reliability against trigger feel deliberately.

Does this fit a Commander-frame 1911? This spring is sized for the Government-frame mainspring housing; confirm your housing length before ordering.

Buy the Nowlin 19.5 lb Government Mainspring

Nowlin manufactures its own precision 1911 fire control parts rather than reselling generic components. Browse our full handgun parts selection and order yours from our Lubbock, Texas gun shop, and we’ll get it moving as soon as it’s ready to ship.