These files give your Nerf Retaliator or Nerf Magnus the appearance of a SPAS-12 shotgun.
These files are built to wrap around 1" PVC commonly found in North America. The parts are mounted to your blaster by using the PVC adapters I uploaded here:
Magnus:
https://www.thingiverse.com/thing:2590061
Retaliator:
https://www.thingiverse.com/thing:3053220
The pump grip has priming bar holes to accommodate 1/8"x1/2" flat bar. The priming bar holes in the pump grip are specifically positioned to line up with the holes in the Retaliator bolt sled. There isn't enough room for a nut so you'll need to tap the holes in the flat bar for your bolts.
I've included a small file called "primingBarTester.stl". If your priming bar cant fit in that hole then it won't fit in the priming bar holes in the pump grip.
Since pump grip is massive I've chopped it up into pieces that will fit on a 5x5x5"(12x12x12cm) build volume printer. The smaller files are in a ZIP file when you download the files.