I like his left hand staying on the Rifle as he raises it...much more natural 
His right foot still moves in an arch as if he is standing on a turn table. Keep the heel of his right foot stationary and slightly rotate the rest of the foot... or better yet, have him step back slightly with his right foot first into the position you want it, then step forward with his left foot as you now have it only just a bit faster for a more natural movement.
Because we are all scrutinizing this unit with personal opinions...I believe it would also be better to have the left foot and leg move faster into position before the attack...looks like about one or two frames less to get there would do it. As it is, it is a little slow motion if you see what I am seeing.
Coming along very well Gary
...as for Victory Shout and Gun Shots, those are no problem and I would send you the sounds to fit the animation when you complete it. I would use the same shot sounds that the Unit uses for the attack so they match the Rifle the same but alter them for the number of shots fired and add the Shout before, after or during the shots...what ever you want the animation to do.
...So don't let a lack of sounds prevent you from making the animation as you want it to be.
Along the same thoughts for your unit concerning sounds, you will need to look at the unit you are using the sounds from and keep the Flc Speeds, Number of frames and the actions that take place on each of the frames basically the same in order to have the sounds fit perfectly with good timing...unless you want to alter the sounds to fit your unit animations that differ from the existing unit in which you intend to use the sounds from.

His right foot still moves in an arch as if he is standing on a turn table. Keep the heel of his right foot stationary and slightly rotate the rest of the foot... or better yet, have him step back slightly with his right foot first into the position you want it, then step forward with his left foot as you now have it only just a bit faster for a more natural movement.
Because we are all scrutinizing this unit with personal opinions...I believe it would also be better to have the left foot and leg move faster into position before the attack...looks like about one or two frames less to get there would do it. As it is, it is a little slow motion if you see what I am seeing.
Coming along very well Gary

...as for Victory Shout and Gun Shots, those are no problem and I would send you the sounds to fit the animation when you complete it. I would use the same shot sounds that the Unit uses for the attack so they match the Rifle the same but alter them for the number of shots fired and add the Shout before, after or during the shots...what ever you want the animation to do.
...So don't let a lack of sounds prevent you from making the animation as you want it to be.
Along the same thoughts for your unit concerning sounds, you will need to look at the unit you are using the sounds from and keep the Flc Speeds, Number of frames and the actions that take place on each of the frames basically the same in order to have the sounds fit perfectly with good timing...unless you want to alter the sounds to fit your unit animations that differ from the existing unit in which you intend to use the sounds from.