1. New Arrival Banner
    Swenson Mainspring Housing Flat Checkered 1911 Officer
    Swenson Mainspring Housing Flat Checkered 1911 Officer
    $35.99
    Available View More Options
  2. New Arrival Banner
    Swenson Mainspring Housing Flat Checkered with Magazine Well 1911 Government, Commander
    Swenson Mainspring Housing Flat Checkered with Magazine Well 1911 G...
    $69.99
    Available View More Options
  3. 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
  4. 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
  5. New Arrival Banner
    Swenson Mainspring Housing Flat Checkered 1911 Government, Commander Stainless Steel
    Swenson Mainspring Housing Flat Checkered 1911 Government, Commande...
    $34.99
    Available
  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
    Available View More Options
  7. 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
  8. Colt Mainspring Housing Flat 1911 Government, Commander Grooved
    Colt Mainspring Housing Flat 1911 Government, Commander Grooved 4.6 (27 Reviews)
    $7.99 - $47.49
    Available View More Options
  9. 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
  10. 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
  11. 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
  12. New Arrival Banner
    Swenson Mainspring Housing with Lanyard Loop Holes Flat Smooth 1911 Government, Commander Carbon ...
    Swenson Mainspring Housing with Lanyard Loop Holes Flat Smooth 1911...
    $26.99
    Available
  13. 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
    Mixed Availability View More Options
  14. 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
  15. New Arrival Banner
    Swenson Mainspring Housing Flat Checkered with Magazine Well 1911 Officer
    Swenson Mainspring Housing Flat Checkered with Magazine Well 1911 O...
    $69.99
    Mixed Availability View More Options
  16. 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
  17. 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
    Available
  18. New Arrival Banner
    Swenson Mainspring Housing Flat Serrated 1911 Government, Commander
    Swenson Mainspring Housing Flat Serrated 1911 Government, Commander
    $26.99 - $34.99
    Available View More Options
  19. 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
    Out of Stock, Backorder OK
    What are product arrival notifications?
  20. 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
    Mixed Availability View More Options
  21. Wilson Combat Mainspring Housing Flat 1911 Government, Commander Aluminum
    Wilson Combat Mainspring Housing Flat 1911 Government, Commander Al... 4.4 (7 Reviews)
    $34.99
    Available
  22. 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
    Out of Stock, Backorder OK
    What are product arrival notifications?
  23. Wilson Combat Bullet Proof Mainspring Housing with Magazine Well One Piece 1911 Government, Comma...
    Wilson Combat Bullet Proof Mainspring Housing with Magazine Well On...
    Clearance — Select Items
    $157.67 - $188.99
    Regular Price: $183.99 - $188.99 Save up to $26.32 (14%)
    Available View More Options
  24. 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
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