A: that was a gauss rifle
Yes, because I totally stated otherwise.
B: the armour never reflected it.
"archaic : to turn into or away from a course : deflect
: to prevent passage of and cause to change direction <a mirror reflects light>
: to bend or fold back
: to give back or exhibit as an image, likeness, or outline : mirror <the clouds were reflected in the water>
: to bring or cast as a result <his attitude reflects little credit on his judgment>"
I'm sure it didn't.
He took the shot in the armour's large bulky shoulders and used the force from the shot to spin around and shoot tychus.
No, he didn't. If he did, there wouldn't have been a pause. We see he's unmoved after the spike hits and only in the next scene does he turn to fire.
Earlier on it shows terran marines getting wrecked by hydralisks who's shots travel several times slower (visibly anyways, I could be wrong).
The same Hydralisk spines which can puncture a starship's armor? Oh yes, those spines.
As I said the terran marines really don't stack up well in the grand scheme of badass space soldiers.
And yet they are incredibly powerful considering their numbers and role.