I am going to be getting a new AR and have narrowed it down to two; either the Colt LE6940 or the Sig 516. Both have rails, flip up front and rear sights, 1 in 7 barrels, chromed lined barrels, and same price. The only difference is a piston vs. and DI. So, which one would you go with and why. It will be used for three gun and patrol work (Deputy). Thanks, Adam Wanna kill these ads? We can help!