These look pretty simple and made from aluminum. Anybody tried one?
https://www.dlptactical.com/products/iphone-android-smartphone-camera-adapter-for-rifle-scope?_pos=1&_sid=8095359ae&_ss=r
https://www.dlptactical.com/products/iphone-android-smartphone-camera-adapter-for-rifle-scope?_pos=1&_sid=8095359ae&_ss=r