[Jeff Rodriguez] has been busy testing a feasible DIY method for rifling a barrel and has found some success using salt water, a power supply, wire, and 3D printed parts to create the grooves of ...

With the idea of a shotgun from a staple gun on a roll, [Clint] continued the build by adding several more barrels, each of which are rifled. The barrel rifling tool is a hack unto itself ...

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After precision reaming, the robot transports the two gun-drilled and reamed barrels to a blow-off station and then loads them into the R-series rifling machine. Gun drilling, reaming and rifling ...

Electrochemical machining (ECM) is well-suited for this challenging application. Barrels have different inner diameters, as well as rifling, which causes a projectile to spin and improves its ...