Solo is a 3D printed device. All you need is a common laser pointer, print this device and you are ready to go
Here are the links to the 3D files. Please download these and print with any 3D printer.
You need to buy any small laser pointer, approximately 7/1.5 centimeters ( most available ones are of this dimension).
The laser gets inserted in the printed device and you are ready to shoot.
Here is the link for a laser pointer of the correct dimensions: https://amzn.eu/d/6RuEG4w
All rifle shooting kits come with an extra button. We will use this extra button to secure the solo device to the kit. Here is the link to my YouTube video with simple, easy to follow steps to assemble your own posture correction device.