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 (93 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 (40 Reviews)
    $82.99 - $89.99
    Available View More Options
  3. Ed Brown Mainspring Housing Arched 1911 Government, Commander Grooved 20 LPI
    Ed Brown Mainspring Housing Arched 1911 Government, Commander Groov... 4.8 (48 Reviews)
    $41.99
    Available View More Options
  4. Nighthawk Custom Mainspring Housing and Magwell 1911 Government, Commander 1-Piece 20 LPI Checker...
    Nighthawk Custom Mainspring Housing and Magwell 1911 Government, Co... 4.1 (7 Reviews)
    $149.99
    Available
  5. Ed Brown Mainspring Housing Flat 1911 Government, Commander Chainlink
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Chainlink 4.8 (55 Reviews)
    $46.99
    Available View More Options
  6. 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 (21 Reviews)
    $79.99
    Mixed Availability 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... 4.6 (12 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... 4.7 (3 Reviews)
    $74.99
    Available View More Options
  9. Springfield Armory Mainspring Housing Flat 1911 Government, Commander Checkered 20 LPI Blue
    Springfield Armory Mainspring Housing Flat 1911 Government, Command... 4.6 (43 Reviews)
    $26.99
    Available
  10. Nighthawk Custom Mainspring Housing Flat with Magazine Well 1911 Government, Commander Scalloped ...
    Nighthawk Custom Mainspring Housing Flat with Magazine Well 1911 Go... 4.5 (11 Reviews)
    $79.99
    Available
  11. Wilson Combat Mainspring Housing Flat 1911 Government, Commander Checkered 30 x 30 LPI
    Wilson Combat Mainspring Housing Flat 1911 Government, Commander Ch... 4.4 (27 Reviews)
    $46.99 - $48.99
    Available View More Options
  12. Colt Mainspring Housing Flat 1911 Government, Commander Grooved
    Colt Mainspring Housing Flat 1911 Government, Commander Grooved 4.6 (27 Reviews)
    $7.99 - $47.49
    Mixed Availability View More Options
  13. Ed Brown Mainspring Housing Flat 1911 Government, Commander Checkered 25 LPI
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Checker... 4.9 (18 Reviews)
    $62.99
    Available View More Options
  14. 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
  15. 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
    Available View More Options
  16. 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 (2 Reviews)
    $184.99 - $189.99
    Out of Stock, Backorder OK View More Options
  17. Ed Brown Mainspring Housing Flat 1911 Government, Commander Smooth
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Smooth 4.7 (23 Reviews)
    $33.99
    Available View More Options
  18. Ed Brown Mainspring Housing Flat 1911 Government, Commander Snakeskin
    Ed Brown Mainspring Housing Flat 1911 Government, Commander Snakeskin 4.8 (10 Reviews)
    $59.99
    Available View More Options
  19. Colt Mainspring Housing Flat Colt Gold Cup Grooved Matte Stainless Steel
    Colt Mainspring Housing Flat Colt Gold Cup Grooved Matte Stainless ... 5.0 (9 Reviews)
    $44.99
    Out of Stock, Backorder OK
    What are product arrival notifications?
  20. Kimber Mainspring Housing with Lanyard Loop 1911 Government, Commander Steel Matte
    Kimber Mainspring Housing with Lanyard Loop 1911 Government, Comman... 5.0 (4 Reviews)
    $54.99
    Available
  21. 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
    Mixed Availability View More Options
  22. Wilson Combat Mainspring Housing Flat 1911 Government, Commander Aluminum
    Wilson Combat Mainspring Housing Flat 1911 Government, Commander Al... 4.4 (7 Reviews)
    $34.99
    Out of Stock, Backorder OK
    What are product arrival notifications?
  23. Kimber Mainspring Housing Flat 1911 Government, Commander Checkered 20 LPI Polymer
    Kimber Mainspring Housing Flat 1911 Government, Commander Checkered... 4.8 (8 Reviews)
    $20.99
    Available View More Options
  24. Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Government, Commander Checkered Skip...
    Ed Brown Mainspring Housing Flat with Drop-In Maxi-Well 1911 Govern... 5.0 (7 Reviews)
    $87.99
    Mixed Availability View More Options
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