Havent had my SU-16 for awhile, but with the 9-10 different mags it's "met". Its a plenty sturdy rifle, but no battle rifle. Its very light, very pointable and sofar for me very reliable. Holds about 2-3moa on surplus stuff, very pointable. Mine went for 390 at St.Louis arms, and Its an amazing deal. Its easy to clean, requires no tools to take completely down. To break it into its component parts all you need is 1 screwdriver, pretty impressive in my eyes.
I like ARs, great rifles but if I've got to carry a poodle shooter make mine an SU. Would love to put a proper low light optic on mine, and see what it'd really do. Bought mine to live in the truck and drop coyotes when the need suits me, but man the more I play with it the more I like it. Reminds me of a P99 actually.