![Marines perform outdoor gas exercise with new M50 mask > Marine Corps Air Ground Combat Center Twentynine Palms > Latest Articles Marines perform outdoor gas exercise with new M50 mask > Marine Corps Air Ground Combat Center Twentynine Palms > Latest Articles](https://media.defense.gov/2011/Jan/26/160632/-1/-1/0/110126-M-0000L-001.jpg)
Marines perform outdoor gas exercise with new M50 mask > Marine Corps Air Ground Combat Center Twentynine Palms > Latest Articles
![In a gas mask and armed with an M16 rifle, US Marine Corps Private First Class Cerny from Weapons Company, 1ST Battalion, 3rd Marines, helps to provide security for his company's monitor In a gas mask and armed with an M16 rifle, US Marine Corps Private First Class Cerny from Weapons Company, 1ST Battalion, 3rd Marines, helps to provide security for his company's monitor](https://cdn10.picryl.com/photo/2001/02/02/in-a-gas-mask-and-armed-with-an-m16-rifle-us-marine-corps-private-first-class-f8eefa-1024.jpg)
In a gas mask and armed with an M16 rifle, US Marine Corps Private First Class Cerny from Weapons Company, 1ST Battalion, 3rd Marines, helps to provide security for his company's monitor
Nine seconds or die: CBIRF trains to the basics every day > United States Marine Corps Flagship > News Display
![Navy and Marine Corps to study facial hair's effect on gas masks, lawsuit reveals | Stars and Stripes Navy and Marine Corps to study facial hair's effect on gas masks, lawsuit reveals | Stars and Stripes](https://www.stripes.com/incoming/vhwkoh-260122GAS-MASKSphoto02.jpg/alternates/LANDSCAPE_910/260122GAS-MASKSphoto02.jpg)