Glock ported barrel DIY?

JaysonCraig

JaysonCraig

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I am considering porting the barrel (and slide) on my glock 17. I have a few questions on it though. First of all, is there any legality to this? I wouldn't be shortening it at all, just cutting slots in the barrel and a port in the top of the slide.
Second, how hard is the barrel/slide? Would a typical TiN or Cobalt endmill be sufficient? I don't have a way to cool as i cut. But with a sharp bit and a bunch of light passes i don't think it will be an issue. The actual mill work itself looks like it would be pretty simple, clamp, locate, cut.
 
they do make a glock 17c, i know you can get a drop in barrel with the cuts already made, i havent seen a slide, but if you have the know how i dont think it would be too hard
 
Glock slides have a very hard finish (Tenifer) RC 69, its a type of case hardening. This is too hard to machine and you would need to grind through this finish first. I also believe the slide is through hardened to RC 40 -48, this hardness can just about be machined!
The normal way to port a glock slide (and barrel) would be with an Electrical Discharge Machining (EDM) also called a spark erosion machine.
 
Seriously? You want to compensate the barrel of a 9mm?

Before and if you do this you may want to know that doing so will void the gun for use in many competitions as far as shooting in the stock or production classes.

In talking with the guys I shoot with that mostly run with Open class guns in IPSC I've picked up that compensators work best with cartridges that produce big quantities of gas so that the extra pressure and gas volume mass has enough energy to hold the muzzle down effectively. The one guy working with a 9mm Major setup has to select his powder carefully from just a couple of options to ensure he has the power to make major in Open and to produce enough gas volume for the compensator to work well. On factory 9mm I just can't see it working well enough to justify the effort.
 
Glock slides have a very hard finish (Tenifer) RC 69, its a type of case hardening. This is too hard to machine and you would need to grind through this finish first. I also believe the slide is through hardened to RC 40 -48, this hardness can just about be machined!
The normal way to port a glock slide (and barrel) would be with an Electrical Discharge Machining (EDM) also called a spark erosion machine.
Click to expand...

The tenifer (nitrided) 'finish' is only about .002" thick. So you wouldn't have to grind the surface off, but you would be ill advised to try and use HSS or Cobalt tools as you'll burn them out fairly quickly. Carbide would do the job but you would have to use coolant. The barrel will probably only be in the mid to high 30's Rc so you COULD use HSS but carbide is still better. You can machine up 62Rc (IIRC) with carbide but your tool life will be shortened drastically.
 
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