actually, mine is the SU16C.. I forgot to mention that.. but it's the one that has the bipod and the folding stock that doesn't break the gun action open to fold.
I like mine..and love keltec. my p3at is my constant friend. it's my regualr carry gun. used to carry a sig p230.. but only do so in the winter now due to size.
i've used all sorts of generic and milsurp ar type mage in her.. though have not tried a snal mag as i am unsure if there is enough clearance.. and don't want to pay 120$ to test it..
with pic rails on her and a holo site and a flashlight and a ar mag on her with a double mag clamp so you can snatch out flip over and reload.. she looks pretty nice.
as accurate as you can expect from a rifle of that length too. very fun to shoot.. very light.. no fatigue carrying her.. especially if you use a 4pt sling..
the best part is ( for me anyway.. ) she will digest .223 or 5.56