I've made a few of these tools available that's pretty useful if you swap out recoil springs often.
https://dogedesign.squarespace.com/shop/p/driver16mm
Hi everyone, I'll be releasing the 5 position tube in the above pictures today. These tubes are nice if you are wearing thicker jackets and or plate carriers.
I'm working on another design that has finer adjustment points that I'll be making and testing in the upcoming week.
Thanks for all of the input!