no. ive been tempted to buy Kel-Tec products - especially the SU-16 (in the pursuit of the mystical non-restricted AR-style rifle), and was just doing a last-minute forum search on them to see if i could find any deals when i found out about the receiver failures. so i held off and have been waiting for Kel-Tec to address these issues in both its current and upcoming designs.
Kel-Tec has proven that it is rushing out guns designed to look cool and appeal to the Magpul mall-ninja crowd, but they are untested designs out of substandard materials.
granted every gun manufacturer can - and often does - manufacture some lemons, and some designs have the odd reliability issue from time to time. but after the rash of SU-16 receivers breaking from normal use (from the metal bolt hammering the plastic receiver) Kel-Tec should have been extra careful and put any new product designs through thorough stress testing before greenlighting mass production. it seems that they did not bother to do that, since there is no way the broken rails would have went through a proper product testing and development process. people are breaking them the first DAY they get the gun, FFS.
im not sure how they are going to handle this.. theyve made thousands of KSGs and theyre breaking left and right. what are they going to do, replace the rail under warranty and tell the customer not to put a foregrip on it? thats the entire point of having the front rail. this should have been caught and addressed during product development and testing - a stage Kel-Tec seems to be skipping, or at least skimming through.
a lot of people are rabidly anti-plastic. i am not at all: i think that modern composites have their place on guns and can offer improvements in weight/weather resistance/ergonomics/function/etc when used in the right areas and applications. that said, i do not believe that plastics should be used in the critical high-wear/high-impact/high-stress areas that Kel-Tec is indiscriminately using them in -- and their failures prove it.
oh, and BTW, its July. Wait till January and see what else breaks when the plastic becomes even more brittle.
of course someone will jump in with the whole Glock argument in a minute.... but if you think that Kel-Tec making receivers and rails out of plastic is anything but a production cost-saving measure you are sadly mistaken.
people are saying 'it doesnt cost that much, so its not as if a $2500 gun were breaking'. yeah, at ~$1000 its not the most expensive gun in the world, but there is still a basic level of quality and reliability that you should expect from a gun. for that much money you can get an all steel 870 Police with several mods/accessories, and it will endure a lifetime of hard use. its not bristling with plastic picatinny rails and doesnt look as cool, but it will be recognized as a time-tested, reliable tool as opposed to a tacticool toy.
if you own a KSG or plan to get one despite the Kel-Tec quality issues, knowing what you are getting into but willing to do so anyway because you like the design and features - thats great, and i sincerely wish you luck. but dont try and convince people that this is a rock-solid platform supported by a quality manufacturer.
, the gun felt like a Chinese toy. The rifles belong to a couple local buddies. The SU was a disaster from day one with pierced primers and all the fun that went with that. The Sub shoots quite well but feels like it'll snap in half. 
