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

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 May 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.

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COSC Fall 2026 Gun Show

The next COSC Gun Show will be held on Sunday, October 4, 2026, from 9:00 AM to 3:00 PM.

For questions, vendor information, or volunteer opportunities, please contact Gun Show Manager Mike Rhoads at 517-643-5989 (call or text).

Available documents:

• Vendor table request form
• Gun show rules and regulations
• Event advertising flyer

Please help support the event by sharing or posting the flyer at local gun shops, sportsman’s clubs, American Legion posts, VFWs, and other community locations.

Our previous show had a great turnout, and we are always looking to welcome additional vendors and attendees.

Volunteers are needed for:

• Saturday setup
• Placing and collecting roadside signs
• Assisting vendors with unloading and loading
• Table teardown and hall cleanup

If you are interested in volunteering, please contact Mike directly.