https://www.milsurps.com/images/impo...high_res-1.jpg
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Is that a cloud of smoke from firing the rifle with the early not fully smokeless powder, and if so, it seems may be the firing in damp weather/air. Or is the cloud from something else??
I love those long bayonets...
I notice that it is in line with the muzzle. I wonder whether it is a dry day and the shock wave from the muzzle is kicking up a cloud of dust?
Bob
Dust blown up by the muzzle blast and gas from the gas piston is my guess.