This is my proof of concept prototype fanny pack holster setup still in progress. It's not ideal. I used materials that were readily available so I could see if the concept of carrying with the pistol at my rear was even viable. I originally tried a wider version that would have held 5 magazines, but that was a total failure because I could not readily draw the pistol and clear the holster behind me. I narrowed the frame substantially, which now only holds 2 extra magazines. But now I can easily draw from the rear position.
It is intended to be used while I carry on my bicycle. I added a bullet stop to the barrel end made from 7 layers of aluminum sheet, totaling 1/2" thick. I need to do some testing to make sure that the bullet stop will function properly. That will need to wait until the weather warms and I can do some outdoor testing.
I used a heat gun to soften the 0.060" thick ABS sheet to bend the plastic into shape to create the magazine carriers. I used solvent based ABS plumbing cement to glue the pieces together. The holster itself is the cheap stock Sig holster that came with my P365. I extended the magazine release button so I had to modify the holster to accommodate the extended button. I removed some parts of the holster and glued the holster to an aluminum sheet. The aluminum sheet was then bolted to the aluminum frame.
This is working out much better than I expected. But there has been a lot of trial and error. I see a lot of room for improvement, but those changes will need to wait until the next version. I need to add a way to lock the pistol inside the holster and to be able to secure the fanny pack to my bicycle.
I also need to find enough room to add a battery and an audible alarm. I want to arm the fake top flap so that an alarm goes off if someone tries to steal from it. As you can see, the actual access is from the sides. The aim is to have it look like a dorky looking fanny pack that nobody will pay much attention to. Basically, hiding in plain sight.
I'm still working on the waterproof Cordura fabric cover, so that isn't shown yet. I bought a sewing machine at a thrift store. I had to do some work on the sewing machine to get it working properly. But it will now sew through several layers of waterproof Cordura fabric for the holster cover. Figuring out the order in which to sew the panels together was far more difficult than making the aluminum frame and fitting the holster and magazine carriers inside.
