XM28 Grasshopper gas mask

US tunnelrat wearing the XM28E4 "grasshopper" gas mask during the Vietnam War.
US soldiers wearing the XM28E4 "grasshopper" gas mask during the Vietnam War.

The U.S. Army XM28E4 Riot Control Agent Mask, colloquially known as the "Grasshopper" for its profile,[1][2] was an American experimental gas mask designed for use by tunnel rats deploying tear gas in the Viet Cong tunnels during the Vietnam War.[2] The existing M17 gas mask was too bulky for tunnel warfare and thus the XM28 with its slim design was introduced.[1] Development started in 1966 and after 4 revisions the XM28E4 was introduced in 1968.[1][3] Its internal cheek filters and low profile made it extremely light and compact.[1][2]

References

  • Mask, Riot Control Agent, XM28E4. US Army. 1967. 4240-880-0010.

Notes

  1. ^ a b c d "XM28 Riot Gas Mask". modernforces.com. Retrieved 2026-01-04.
  2. ^ a b c "U.S. Army XM28E4 Riot Control Agent Mask". gasmaskking.com. Retrieved 2026-01-03.
  3. ^ "XM28 Lightweight Protective Mask". vietnamgear.com. Retrieved 2026-01-04.
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