For what it's worth. Our outdoor shop & gun range rents out guns/rifles and up on the rack is a Kel Tec P3-AT. It was taken in used 4 yrs ago and in all honesty, this shop usually cleans/lubes their firearms when they're taken in the back shop for repair. This thing has a light layer of rust on the barrel & slide, dust & black grime all over the inside yet...people would on occasion rent the thing & it still functions beautifully. It hasn't malfunctioned! if that isn't a true testament to the design of a firearm then I don't know what is...I've seen more Ruger mk III's & Victory 22's go back to the shop than these kel Tec's. lol.