Small advise regarding the pistol: When designing items like that think about how would they be used. Where would the hand go? Would it be comfortable on the grip? Is it not too far and does it go low enough? Things like that. With this picture in particular, you could make the trigger point the other end. Most guns go ( because then the side going inward is shaped like the finger of the gunner, so it fits in better and it's easier to pull. With the shape you have right now it could slip.