[How to stop bump fire AR9?]

I was at a uspsa match over the weekend and I have a palmetto state lower kit for AR9 and a bear creek upper 16in. While shooting later in the day I stated to get a bump fire, what do I do to get rid of it?

[STI question]

I’m interested in shooting Uspsa with one in limited. 

[Big stick feeding]

Thanks for the info. I’m going to give it a try 

[Big stick feeding]

I’m running factory and rmr 115g and blue bullet 124g reloads at 1.100in length 

[Big stick feeding]

Is that a easy swap for a ramp barrel onto my upper?

[Big stick feeding]

Karries k lower I know cheap off brand but runs great on standard size Glock and magpul magazines 

[Big stick feeding]

I’m running Frankenstein pcc and I have a bear creek upper. I cannot run a big stick anything past 27 rounds. Is there anything I could to fix the problem. 

[STI question]

Has anyone shot a STI tactical in a 9mm?