I bought Martyr and Prophecy through steam. I have linked my steam account to my neocore account. I live in Texas, USA, North America. I have a very stable internet connection to other online only games such as MWO, PoE, D3, D2R, etc. I only mention this because I am at a loss as to why my problem is happening, I'm thinking it must be lag.

Problem: When I hold down the right mouse button to fire my radium rifle full auto, sometimes it fires full auto and sometimes it fires a single shot, then when I release the right mouse button it fires a single shot again. 

Can anyone please explain why this happens?