I actually made that costume last year for Halloween. Here's a decent reference pic I found somewhere online...
Boots are Airwalk (same ones used in the Matrix, if I recall)
Pants are basic US issue BDU
Jacket I think is an aftermarket bomber jacket that were modified. Sleeves removed and fake mag pouch/pockets sewn to the front.
He carries a cut-down Mossberg 12ga in a custom holster on his right leg. Left side has a gurkha knife tied to his leg.
Axe, I assume was custom made also...
Here's a pic of my axe before it was finished:
I built it in about 4hrs, with scraps laying around the shop. Here's a pic of a friend holding the axe, give a since of scale:
Considering I was doing this costume for halloween and on a budget of about $50, I cut a bunch of corners and just went for the overall look instead of super screen accurate. Unfortunately I do not have one decent pic of my overall costume.
If time allows, I may revise the costume with more accurate parts for DragonCon.