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  1. Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Government, Commander Checkered 25 LPI
    Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Govern... 4.6 (84 Reviews)
    $79.99
    Available View More Options
  2. Kimber Mainspring Housing Flat with Oversized Magazine Well 1911 Government, Commander Checkered ...
    Kimber Mainspring Housing Flat with Oversized Magazine Well 1911 Go... 4.8 (32 Reviews)
    $82.99 - $89.99
    Mixed Availability View More Options
  3. Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Government, Commander Snakeskin
    Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Govern... 4.8 (18 Reviews)
    $79.99
    Available View More Options
  4. Ed Brown Mainspring Housing Arched 1911 Government, Commander Grooved 20 LPI
    Ed Brown Mainspring Housing Arched 1911 Government, Commander Groov... 4.8 (36 Reviews)
    $41.99
    Available View More Options
  5. Nighthawk Custom Mainspring Housing and Magwell 1911 Government, Commander 1-Piece 20 LPI Checker...
    Nighthawk Custom Mainspring Housing and Magwell 1911 Government, Co...
    $149.99
    Available
  6. Ed Brown Mainspring Housing Flat 1911 Government, Commander Chainlink
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Chainlink 4.8 (52 Reviews)
    $46.99
    Available View More Options
  7. Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Government, Commander Chainlink
    Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Govern... 4.5 (8 Reviews)
    $77.99
    Available View More Options
  8. Ed Brown Mainspring Housing Arched with Drop-In Maxi-Well 1911 Government, Commander
    Ed Brown Mainspring Housing Arched with Drop-In Maxi-Well 1911 Gove... 5.0 (1 Review)
    $74.99
    Available View More Options
  9. Colt Mainspring Housing Flat 1911 Government, Commander Grooved
    Colt Mainspring Housing Flat 1911 Government, Commander Grooved 4.6 (25 Reviews)
    $7.99 - $47.49
    Available View More Options
  10. Springfield Armory Mainspring Housing Flat 1911 Government, Commander Checkered 20 LPI Blue
    Springfield Armory Mainspring Housing Flat 1911 Government, Command...
    $26.99
    Available
  11. Colt Mainspring Housing Flat Colt Gold Cup Grooved Matte Stainless Steel
    Colt Mainspring Housing Flat Colt Gold Cup Grooved Matte Stainless ...
    $44.99
    Available
  12. Wilson Combat Bullet Proof Mainspring Housing Magazine Well 1-Piece 1911 Government Commander 30L...
    Wilson Combat Bullet Proof Mainspring Housing Magazine Well 1-Piece... 4.0 (1 Review)
    $184.99 - $189.99
    Mixed Availability View More Options
  13. EGW Mainspring Housing Flat Checkered with Magazine Well 1911 Government, Commander Steel Blue
    EGW Mainspring Housing Flat Checkered with Magazine Well 1911 Gover... 3.0 (3 Reviews)
    $64.99
    Available
  14. Ed Brown Mainspring Housing Flat 1911 Government, Commander Checkered 25 LPI
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Checker... 4.9 (14 Reviews)
    $62.99
    Available View More Options
  15. Wilson Combat Mainspring Housing Flat 1911 Government, Commander Checkered 30 x 30 LPI
    Wilson Combat Mainspring Housing Flat 1911 Government, Commander Ch... 4.4 (25 Reviews)
    $46.99 - $48.99
    Mixed Availability View More Options
  16. Ed Brown Mainspring Housing Bobtail 1911 Government, Commander Checkered 25 LPI
    Ed Brown Mainspring Housing Bobtail 1911 Government, Commander Chec... 5.0 (4 Reviews)
    $74.99
    Available View More Options
  17. Wilson Combat Bullet Proof Mainspring Housing with Magazine Well One Piece 1911 Government, Comma...
    Wilson Combat Bullet Proof Mainspring Housing with Magazine Well On...
    $183.99 - $188.99
    Mixed Availability View More Options
  18. Nighthawk Custom Mainspring Housing Flat with Magazine Well 1911 Government, Commander Scalloped ...
    Nighthawk Custom Mainspring Housing Flat with Magazine Well 1911 Go... 4.6 (9 Reviews)
    $79.99
    Out of Stock, Backorder OK
    What are product arrival notifications?
  19. Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Government, Commander Chainlink II
    Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Govern...
    $77.99
    Available View More Options
  20. Ed Brown Mainspring Housing Flat 1911 Government, Commander Smooth
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Smooth 4.7 (19 Reviews)
    $33.99
    Available View More Options
  21. Ed Brown Mainspring Housing Bobtail 1911 Government, Commander Smooth
    Ed Brown Mainspring Housing Bobtail 1911 Government, Commander Smooth 5.0 (3 Reviews)
    $54.99
    Available View More Options
  22. Ed Brown Mainspring Housing Bobtail 1911 Government, Commander Snakeskin
    Ed Brown Mainspring Housing Bobtail 1911 Government, Commander Snak... 4.7 (3 Reviews)
    $69.99
    Available View More Options
  23. Wilson Combat Mainspring Housing Flat 1911 Government, Commander Aluminum
    Wilson Combat Mainspring Housing Flat 1911 Government, Commander Al...
    $34.99
    Out of Stock, Backorder OK
    What are product arrival notifications?
  24. Ed Brown Mainspring Housing Flat 1911 Government, Commander Snakeskin
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Snakeskin 4.8 (8 Reviews)
    $59.99
    Mixed Availability View More Options
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