For an instant upgrade to your government 1911 pistol, Nighthawk Custom’s Drop-In Series 1911 mainspring housing provides improved durability and aesthetics over plastic and MIM stock offerings. Each mainspring housing is Fully Machined™ from a premium-grade 416 stainless steel billet and blued to provide unmatched durability. To improve grip on the pistol, 25 LPI checkering has been added. Experience the Nighthawk Difference with the highest quality drop-in 1911 parts available.
May require minor fitting.
- 416 Stainless Steel
- 25 LPI Checkering
- Flat (Straight) Back
The Nighthawk Custom line of Fully Machined parts are designed to be the gold standard in the 1911 parts industry. All Fully Machined parts have been fully CNC machined from solid steel billets. We never use cast, metal injected moldings or polymer parts. In order to create the World’s Finest 1911s, only the best materials can be used. That is why you can trust Nighthawk Custom Fully Machined parts in your 1911.
All Fully Machined parts are backed by a lifetime warranty.
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