Converted a 20 inch barrel Mossberg 500A shotgun to a bullpup configuration ( original length: 41 inches, bullpup length: just over 30 inches) using an aftermarket stock kit. The stock kit slide left a lot to be desired so I designed a textured grip that attaches via bolts to threaded inserts in the stock slide. I printed a version("Bullpup Grip Textured Full Lowered") at draft quality (PLA, .25 mm per layer, 20% infill) and test fired the shotgun using it. It held up with no signs of damage or failure to 60+ rounds and really improved the ergonomics and manageability of the shotgun. I printed the final version("Bullpup Grip Textured Partial Lowered") in ABS, .1 mm per layer, 100% infill. Firearms are inherently dangerous, be aware and follow all safety procedures during use.