The U300 Action features a swappable bolt head, allowing users to change calibers within the same action. Available in 223, 308 & Magnum bolt faces, the bolt heads make moving to a different caliber inexpensive & straighforward. 4340 steel construction with a nitride finish.
- 223 Bolt Face: .384"
- 308 Bolt Face: .477"
- Magnum Bolt Face: .535"
Big Book Catalog, Issue:70, Page:155