8in Porting Mandrel

The 8in Porting Mandrel from POWERHOUSE is a precision gunsmithing tool designed for armorers and gunsmiths engaged in barrel porting work on tactical rifles and pistols. This mandrel is essential for ensuring proper alignment and support when drilling or milling porting ports into firearm barrels, which helps maintain consistent bore axis centering and prevents drill walk or misalignment during the machining process.

Constructed to exacting tolerances, the 8-inch length of the mandrel accommodates standard rifle barrel profiles, providing ample working surface for secure seating in a milling machine vice or gunsmith lathe. Its precision-ground surface minimizes runout when secured, which is crucial for producing ports that symmetrically reduce muzzle rise and recoil impulse across both sides of the bore.

This mandrel is particularly beneficial for professionals who require precision in every porting job, including those working with AR-15 and AR-10 platforms as well as bolt-action tactical rifles. Its lightweight and compact design makes it easy to integrate into any gunsmith workspace, ensuring that users can achieve repeatability and accuracy in their work.