COMBAT OUTPOST REILLY, Afghanistan — There’s nothing like a combat zone gymnasium to make you feel like a doughy, wimpy scrub. At least that’s the experience I had after checking out the gym here today. I’m a gym rat myself and a veteran of Washington, D.C.’s summer softball leagues, but with the air temperature soaring well above 100 degrees, I was surprised to see Lance Cpl. Joseph Roncolato and Cpl. Mikah Rust, both assigned to Kilo Company, 3rd Battalion, 6th Marines, pumping iron as though they were in the air-conditioning at their neighborhood Gold’s Gym. The gym is a sight…