Evolution Gun Works 20 LPI Checkered Steel Mainspring Housing Blue 1911 Government/Commander

EGW 20 LPI Mainspring Housing Fits 1911 Commander/1911 Government, Stainless Steel

EGW Arched Serrated Mainspring Housing w/Lanyard Loop Retro Colt Style (GI) Fits WWII 1911, Blue

Iver Johnson 1911 Mainspring Housing Fits Government Commander 1911 45acp

Kimber 1911 Government, Commander Flat Mainspring Housing Checkered 20 LPI Polymer Black

Kimber 1911 Government, Commander Flat Mainspring Housing Checkered 20 LPI Polymer Silver

Kimber Flat 1911 Government, Commander Mainspring Housing with Oversized Magwell Checkered 20 LPI Stainless Steel

Fusion Firearms 1911 Gov Mag Well Mainspring Housing Chainlink Stainless M