This mail-in promotion offers you a chance to receive a FREE NXe 4 pod harness or the U.S. Army 4+1 harness with the purchase of the applicable markers shown above. This promotion runs October 1 - December 31, 2012. All you have to do is buy one of these markers from The Paintball Sphere. Then, using your receipt and the box with the UPC number, go here to fill out the rebate form online. After that, just wait for your new, free pack!