Breach Bang Clear’s “The Thyrm Switchback, Small Appendages and a Glock from the Heavens” by Chris Hernandez on January 31, 2015.
“I fired about eighty rounds with the Backup. I was able to maintain a good grip, fire accurately (at close range), and keep the light on constantly as I engaged. I was carrying spare mags in my weak-side front pants pocket, and I was able to pull mags from the pocket, reload and rack the slide without taking the light off my finger. … I had unlocked the formula: hand size + correct light + the right gun = successful Switchback use.”
After testing SwitchBack strength: “The ring broke before the dowel rod. It was a totally non-scientific experiment and I couldn’t swear the ring would give before my finger, but I’m convinced carrying a Switchback is worth the risk.”