Unlike other low-profile over and unders, the Citori 725 features a transverse-mounted, full-width tapered locking bolt and full-width hinge pin to maintain the legendary Browning strength and reliability counted on for generations. The locking bolt engages a full-width tapered recess in the rear barrel lugs. Tapering the bolt and recess allows the bolt to seat deeper, accommodating for wear. Unlike guns with side-mounted trunnions, the 725's hinge pin extends the full width of the receiver for maximum strength. Like the original Citori, the 725 is engineered to wear in, not out.