EN166B is likely to be acceptable, but is a lower level of impact protection than EN166A ….. but if you run down the thread as below you may not be able to get lenses at that standard
EN166B is likely to be acceptable, but is a lower level of impact protection than EN166A ….. but if you run down the thread as below you may not be able to get lenses at that standard
I've seen a few recorded instances of a lens detaching from the frame, but not a failure of the polycarb itself. Anything close to 2mm should shrug off airsoft energies, I'd be interested in hearing the circumstances of an exception.