It's a foregone conclusion that AT&T is about to release a ruggedized version of the Galaxy S7 called the Galaxy S7 Active. It's done it for the last few Galaxy flagships, and the phone has leaked a few times. Now, Venture Beat has more detailed specs for the device, and most of it is no surprise. It's a GS7 with a different chassis and a bigger battery. The size of that battery is a bit of a surprise—it's apparently 4,000mAh.
So, we're looking at a Snapdragon 820, 4GB of RAM, a 5.1-inch 1440p Super AMOLED, and 32GB of storage with a microSD card slot. That 4,000mAh battery will be 400mAh larger than the one in the GS7 Edge and 1,000 larger than the regular GS7. It's also only 15g heavier than the regular GS7 (185g vs. 170g). It'll be 9.9mm thick, compared to 7.9 for the non-Active phone.
The GS7 Active is a bespoke device made just for AT&T, so if you want it you'll have to get with Ma Bell. AT&T has yet to acknowledge the phone's existence, but a release date of June 10th is expected (the date on the phone screens).