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Nighthawk Custom Drop-In Mainspring Housing Up to 20% Off w/ Free S&H — 4 models

Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
1 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
2 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
3 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
4 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
5 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
6 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
7 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
8 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
9 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
10 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
11 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043
12 of 12 images
Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043

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Product Info for Nighthawk Custom Drop-In Mainspring Housing

For an instant upgrade to your government 1911 pistol, Nighthawk Customs Drop-In Series mainspring housing provides improved durability and aesthetics over plastic and MIM stock offerings. Each mainspring housing is Fully Machined from a solid steel 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 parts available.image

Specifications for Nighthawk Custom Drop-In Mainspring Housing:

Manufacturer: Nighthawk Custom
Gun Make: 1911 Platform
Gun Model: 1911

Package Contents:

  • Nighthawk Custom Drop-In Mainspring Housing

What firearm models does the manufacturer say Nighthawk Custom Drop-In Mainspring Housing is compatible with?

The manufacturer suggests that Nighthawk Custom Drop-In Mainspring Housing is compatible with 1911

Nighthawk Custom Drop-In Mainspring Housing Orderable Models

List of Orderable Models

  • Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1040 , MPN: SDP1040 , UPC: 80683002133 , Code: 2YS-MSH-DP4-SDP1040
  • Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Blued Carbon, No Well Cut, Fully Machined Steel, SDP1042 , MPN: SDP1042 , UPC: 80683002157 , Code: 2YS-MSH-DP4-SDP1042
  • Nighthawk Custom Mainspring Housing, Drop-In, Officer, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1043 , MPN: SDP1043 , UPC: 80683002164 , Code: 2YS-MSH-DP4-SDP1043
  • Nighthawk Custom Mainspring Housing, Drop-In, Government, 25 LPI Checkering, Stainless, No Well Cut, Fully Machined Steel, SDP1041 , MPN: SDP1041 , UPC: 80683002140 , Code: 2YS-MSH-DP4-SDP1041
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Last updated 2026-11-03 UTC.