About this 3D model
This is a dual magazine-holder for NERF Nstrike 18-clip. all you need is a bit of tape to put on the magazine, UNDER where this device is to prevent the 18-clip from slipping out. you just need a 3-4cm strip of tape for this, tape either the front or rear side of each clip. I tried not to make the clamping force too tight otherwise it will interfere with the feeding of darts. During a game, a magazine may be switched on the fly. Just pull out the magazine from the side rather than from the top, and snap a new magazine in.