These kits will drop in to any Wilson or Kimber Compact (or any other 4" slide 1911)with a fully supported recoil spring plug (as opposed to the half-moon style).

The rod will come in and out WITHOUT tools but we drilled a takedown pin hole for those who like that feature. The plug is a flush fit with the slide.

The 22# spring is ideal for .45 ACP Compacts. This spring was rated by the manufacturer to last more than ten times the service life of a round wire spring.
Flatwire Compact Kit