Joint Service General Purpose Mask (JSGPM) M-50/M-51 - USAASC
M50 US Military Respirator Gas Mask | Avon Protection
CamelBak CBR-X Protective Mask Adapter, NSN 8465-01-517-4773 (90522), Type M -- For Millennium, M17, M40-M42 Series, MCU2P, M70 Series, and C4 (Canada) - The ArmyProperty Store
Avon M50 US Military Issue Gas Mask, JSGPM, Joint Services General Purpose Mask
GM54 M40 SERIES G.I. ISSUE GAS MASK - AWS INC
Army M50 Gas Mask with Case and Accessories, Size Large - Army Surplus