This outfit was extremely comfortable to wear all day. My next challenge to 100% complete the costume is: Add on the rest of the black panel/line things for detail; make or find some type of knife holster.
Shoulder Harness: Commissioned.
Pants: Cargo capris from Old Navy. On the clearance rack, it was fate! xD
Hat: Bought from Ebay
Gun and Knife: Both are rubber-made training weapons from Amazon
Earpiece: Cellphone wired headset from Amazon.
All the other tactical gear: Bought from Amazon. Gloves were from Hot Topic.