So what to do when there’s no mold gun available for your specific gun? That’s the problem I had with my new CZ 75 Shadow Line. The only mold I could find was a replica blue gun, which was expensive, and would need lots of modifications to make it holster-mold ready. So I looked around YouTube for mold-making solutions. First, thanks and thumbs up to Red Feather Gear. Great, clear videos on the subject of making mold guns–extremely helpful.
Sometimes, however, no matter how good the video instructions, you have to fail before you succeed. The first mold attempt hemorrhaged epoxy like the devil taking a whiz, so bad, in fact, that the mold was a total loss. There was no way to clean it up enough to use again.
For the second attempt, with the luxury of perfect 20/20 of hindsight, I made a few changes. I won’t go into the details that Red Feather Gear has already covered well, only what I learned. Wherever I mention a specific product, I’ve included a web link to the source.
The epoxy used to fill the mold was from Reynolds Advanced Materials, in Tempe, Arizona. Great folks, extremely knowledgeable and helpful. Because the mold will need to withstand high Kydex temps, they recommended, Smooth-On EpoxAcast 670 HT. Its more challenging to mix, not one to one, and will require a scale that measures in grams. The ratio on this product is 100A:16B.
The second mold was perfect–great detail, no leaks. I let the epoxy cure for two hours before removing the polystyrene mold. While removing the mold, one half of the polystyrene shattered and will not be usable for a second mold. I used this method, however, because I only needed a single mold of the gun. If I was in the mold-making business, I’d have made a rubber-mold that could have been used over and over. Red Feather Gear also has videos on that process. The CZ 75 Shadow Line took about 10 ounces of material by volume. One kit of the EpoxAcast 670 HT was a little less than fifty bucks, and should be able to mold three to four guns, depending on the size of the gun.
So today I’m going to mold a double magazine carrier for the CZ 75 Shadow Line. I’ll let you know how it goes!