This is beautiful and the Marine looks like he knows he has already won and is just swanking his way around curbstomping the enemies of Man. As befits Pre-Heresy, his armor’s fine details come togethet to make it look a lot more advanced than current powered armor and his weapon is a fittingly confusing mix of what is clearly bullets and a barrel that looks like it implies some sort of energy manipulation. Like an Astartes sized, two-handed macro-stubbed (a powerful Mechanicus infantry weapon).