Recently purchased an SU-16C based upon recommendations from many on this site, and elsewhere.
I've had a chance to completely break it down, examine the construction and shoot it extensively.
This is one great and well made defense/survival rifle.
In my view superior in design to the AR type. Much more user friendly, and much easier to keep the fire control area clean.
Totally reliable and accurate as well with quality ammo, good mags and proper lubrication. The zytel stock is incredibly rugged and lightweight, unlike some suggest. The rear sight is a little cheesy in design, but functions very well practically. With the Picanty rail included most will opt for an optic sight.
I consider this the best firearms purchase I've made in quite sometime.
I can without hesitation state that in my current situation, I prefer this rifle to the AR, for reasons that I will list if anyone likes.