Pro-Shot's AR style bore guides are manufactured using delrin. Delrin is a chemical resistant material that will stand up to continual use. The Delrin AR15, AR6.8, and AR10 bore guides are both packaged in a convenient re-usable plastic tube.
For concerns or more information contact Pro-Shot Products directly.
Pro-Shot Products
311 S. Baughman Rd.
Taylorville, IL 62586
217.824.9133