The riflemen had not been issued their weapons yet, and hence they trained with wooden mock-up rifles.
She was quite the rifleman and could pick off a squirrels with a .22 from across the field with amazing accuracy.
However carefully the good rifleman kept out of sight, the smoke of his rifle was plainly seen at the moment of firing.
In my opinion a qualified rifleman should be able to bring off the snap reliably, whether or not he ever needs it.
On that rearward motion, a skilled rifleman opens the bolt, ejecting the empty.
He's even found time for TV stardom (Rifleman Daniel Hagman in the Sharpe series ).