Optimised Nerf AR-15 Pistol Grip

I did an optimisation of neogeek's Nerf AR-15 pistol grip internals to allow it to print faster. I basically hollowed out the centre of the pistol grip so that it could print with a simple infill layout inside.

Based on print settings of 0.2mm, 2 layers with 20% infill, this model is able to achieve a 15% faster print time.