APS m870 MKII shotgun shell

thingiverse

Made specifically for the APS m870 co2 shell ejecting shotgun, these replicas perfectly match the dimensions of APS hokkatsu shells. However, they boast more interior volume, making them highly efficient in their design. The feed and ejection mechanisms function flawlessly with no issues at all. I've conducted some calculations to determine the cost of production for one shell, assuming a $15 USD price tag per 1kg filament. According to my estimates, it costs approximately 17 cents to manufacture each shell. In comparison, authentic hokkatsu shells typically retail between $15 and $20 for a pack of four. I've also made some adjustments to the design, beveling certain interior dimensions to eliminate the need for support structures. This allows for a more streamlined production process with no added complexity. Update 2/13/18: The rear hole has been widened, and a larger lip has been added to the rim of the shell, enhancing its overall functionality.