As a former owner of a Kel-Tec "Sweet-Sixteen", You have a truly affordable, Made-in-U.S.A. [Cocoa Beach, Florida] designated-Survival Rifle with more AR-compatibilities built into it than an entire page out of Cheaper-Than-Dirt accessories.
Your photo shows the "Charlie/ C-model" which is best for firing-capabilities while under-folded. Just will be harder for magazine-exchanges but You are set if You truly have ownership of this type of rifle now.
I’ve made minor modifications to the stock and practiced mag changes until I am completely comfortable with it. What drew me that that particular piece initially was how maneuverable it is within the confines of the cockpit - in the folded state of course.