Ti-Rant 9 is full auto rated. Have run the ones I have on SP5K's with sears. Ran the heck out of them. No issues. From second hand knowledge I'm fairly confident one would be taken care of if problems occur under non-obscene usage.

However, I prefer the MK9K over the Ti-Rant by far. GSL Technology makes the the newest iteration of the venerable MK9K and it is probably the best thing going for subguns right now.

Several friends deep, deep into the NFA game are raving about them with almost all having ordered more or soon to do so.

I won't be ordering another Ti-Rant except for pistols. GSL is where it's at right now.