CVA .50 Caliber 36″ Black Fiberglass Ramrod #AC1473 The CVA 50 Caliber Fiberglass Ramrod is a great replacement ramrod for nearly any black powder rifle. Constructed from fiberglass this ramrod will bend but will not break, and the 36″ length of the rod will allow you to custom fit the rod to your rifle. The 11/32″ diameter rod and 10-32 thread are compatible with almost all cleaning attachments.