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Notice: This is a private range. Club membership is required to use these facilities.

Membership Application
Range Rules (PDF)

COSC is a family-friendly gun and archery members only club in Dimondale, Michigan promoting the safe and responsible use of firearms and archery activities in the Mid-Michigan area.

Our Mission: To promote the safe and responsible use of firearms and archery activities in the Mid-Michigan area.

COSC Pledge: I give my pledge as an American to save and faithfully defend from waste the natural resources of my country, its air, soil and materials, forests, waters, and wildlife.

  • See the March newsletter for all of the upcoming club activities. Be advised, activities are subject to cancellation due to weather or public health advisories from the State of Michigan. 
  • New 1-year and 5-year rates for NRA membership!
  • Clubhouse Rental (for Members Only) information can be found on our Clubhouse page.
  • To report lost or found items: cosclostandfound@gmail.com
  • Club By-Laws – If you wish to review the latest revised (Jan 11, 2021) by-laws,
    Bylaws January 11, 2021. 
  • Is your home address up-to-date with our Membership Committee? If not, please let us know.

CANCELLED – COSC Spring 2026 Gun Show

Due to unforeseen circumstances, the Spring 2026 COSC Gun Show has been cancelled. The Fall Gun Show is scheduled for Sunday, Oct 4, 2026. Mike Rhoads will be the gun show manager. Any questions, please call or text Mike at 517-643-5989.