Called Kel-Tec (talked to Shawn)in the Technical Rifle(Su16)section of their facility.
I wanted the latest scoop on their guns and expected longevity.) (especially their SU16 line)
He said one of their latest tests was done by firing 3,000 rounds (all in 100rd drum magazines)rapid fire(within 1 hour).

Lucky the tester was a big strong brute cause after about an hours time(puts some strain on the muscles)
Recorded barrel temp reached was (800 degrees F)

The gun functioned/functions/shoots fine still and they are still using it for demonstration purposes and the gun has exceeded well over 10,000 rds (so far)at this point----just shooting A OK.
Needless to say boys,if it will handle that--under that stuff(how long will it last us guys with normal use/care)?????????

So in a nut shell by these findings they are the real deal.
If ya think I am pulling one over on ya------------call him! Shawn (1-321-631-0068)(Rifle section)SU16's at Kel-Tec