The Volume Soft Lock was developed to work with one handed operation and have less wear and tear on your volume dial from it being torqued up and at an angle. This lock simply slides in either direction unlock or lock your volume adjustment. The lock will also work with their Messenger Radio Carrier and the R.A.C.C. (coming soon).
Order at www.mckydex.com.
Neat idea, those knobs turn too easy. I’ve found a suitably sized o-ring at the base provides sufficient friction against unintended adjustment.