AR15 450 limiter

Buddy from work (a hunter) wanted a magazine limiter for his AR15, which has been converted to a .450 caliber (to satisfy state regulations on hunters using semi-auto rifles). This limiter replaces the standard magazine that fits inside the rifle and limits the rounds held to ONE.

printer: prusa
filiment: pla plus
layer height: .2 or .3
infill: 40%
supports: YES, for latch 'receptacle' area