The Seekins™ Havak Bolt Head is easy to change out and is compatible with all Havak rifles that have the current Gen 2 Bolt. This includes the PH2, Element, and HIT rifles.
Bolt Head Sizing
Small: 223 Wylde
Standard: 6 Creedmoor, 6.5 Creedmoor, 308 Win, 6GT, etc
Magnum: 6.5 PRC, etc