jkx90b4 - PatriotResistance.com
a. Throughout this manual, the term "mask" refers to the M17, M17A1, and M17A2 masks. When data applies to one model only, the model will be specifically identified, b. The M17, M17A1, and M17A2 masks are identical, except the Ml7A1/M17A2 masks have three additional features. The voicemitter-outlet valve assemblies for the M17A1/M17A2