So it started life as an Airsoft Pulse Rifle. Then when I got the Thompson, I decided to rip out the airsoft parts and put in the Thompson. This was not easy as the Thompson used in the airsoft was not exactly the same dimensions so I had to do some extensive internal mods. I though I was done until a really cheap Remington 870 fell into my lap and I decided to go full 2 gun build. The "SPAS" cage needed the most work to fit in the modified 6.5" bbl 870 into it. This plus a combination of other parts from reputable makers made this whole thing a reality.