A simple antler mounting kit I designed for a friend based on one he found online. It can be assembled with two #8 x ½" sheet metal screws and hung on the wall with any screw of head diameter ~0.32". The deer antlers should sit in the groove or flat on the mounting bracket. For added strength, the bracket should be printed so that the flat portion is parallel to the bed with additional supports as needed. Note, this was designed for smaller antlers, so your 12pt pride and joy probably shouldn't be mounted on this.

I also added additional top layers to better hide the infill. This was done after printing the example shown in the pictures.