The Sig Sauer P320 X5 Legion has been on the market for a little while now. So I wanted to bring you a review after shooting more than 30,000 rounds through mine over a year of competing in 3-gun and USPSA. I chose this platform for its ergonomics, weight, and magazine capacity. With its competition-based design and upgrades from Grayguns, this pistol is pretty sweet. Why the X5 Legion Is Great for Competition Right out of the box, the X5 Legion can be a workhorse. It comes with many features that aid the competitive shooter but would be equally helpful for those looking to pick up an X5 for home defense as well. With a five-inch barrel, the gun is plenty accurate for both. Let’s check out how this gun is ready to rock out of the box.