Porting own Barrel?

[dmd45]

I have an extra glock 34 barrel and was going to port this barrel myself.I have been a machinist for almost 15 years and have the knowledge and machines to do this,but my question is what is the best way to remove any burrs from inside the barrel.Thanks

[TheStreetKing]

The Mag-na-port Process


Mag-na-porting is accomplished with Electrical Discharge Machining (EDM), a surgically precise method of removing metal. Dielectric oil is flooded over the area of the barrel that is to be "cut," and an electrode. When voltage is applied, the oil is ionized, which establishes a continuous flow of electrons between the electrodes and the barrel...an electrical arc. It is the electron flow which does actual "machining" of the trapezoidal ports.

The patented Mag-na-port process assures the gun owner of a smooth incision of exact dimension. There is no damage to the metal surrounding the ports; no machining marks, as would be the case subsequent to a drilling operation. The finish is similarly protected, as it is blended into the metal exposed by the erosion process during the EDM operation.

[TimWarner]

I ported a g34 barrel and my G17 barrel.

For both I used a .135" center cut carbide end mill. I believe I ran them @ around 3000 rpm, and got no burr on the inside. After I cut them I lapped the hole a little to smooth it out. A little clover lapping compound and it's pretty shiny, makes for easy clean up.

As far as magnaporting goes, I don't see an advantage to that over a center cut carbide mill. Drilling will leave more of a burr than the mill.

http://home.comcast.net/~twarner21609/photo/full.jpg