![A grunt of 1st Battalion, 14th Infantry Regiment, 4th Infantry Division on tunnel rat duty wearing the experimental XM28 gas mask. [720x653] : r/MilitaryPorn A grunt of 1st Battalion, 14th Infantry Regiment, 4th Infantry Division on tunnel rat duty wearing the experimental XM28 gas mask. [720x653] : r/MilitaryPorn](https://i.redd.it/nkxl1m998sib1.jpg)
A grunt of 1st Battalion, 14th Infantry Regiment, 4th Infantry Division on tunnel rat duty wearing the experimental XM28 gas mask. [720x653] : r/MilitaryPorn
![XM28E4 gas mask, most famously used during the latter stages of the Vietnam War, was meant specifically for riot control agents as a much lighter alternative to the M17. Most famously in XM28E4 gas mask, most famously used during the latter stages of the Vietnam War, was meant specifically for riot control agents as a much lighter alternative to the M17. Most famously in](https://i.redd.it/pbefm2ujcj471.jpg)
XM28E4 gas mask, most famously used during the latter stages of the Vietnam War, was meant specifically for riot control agents as a much lighter alternative to the M17. Most famously in
![US XM28 'Grasshopper' Tunnel Rats Gas Mask from Vietnam w/ Carrier Bag for Sale in Petaluma, CA - OfferUp US XM28 'Grasshopper' Tunnel Rats Gas Mask from Vietnam w/ Carrier Bag for Sale in Petaluma, CA - OfferUp](https://images.offerup.com/QIXfSv7UrSRBDdgvHf2fMMNTVZM=/250x419/e024/e0247518e3144781a8acf53879ee620c.jpg)