Contour
1.25" diameter at receiver. 5" from face of receiver diameter reduces to 0.875" and is constant 0.875" to muzzle thread. Contour is similar to Marksman or Medium Palma.
Wrench Interface
1-1/8" box end wrench interface. Install and remove barrel with a box end wrench and an action wrench, no barrel vice is needed.
Muzzle Thread
5/8" x 24 muzzle thread. Common thread interface for brakes and suppressors.