Scout rifles

[Shinjorai]

Im interested in playing infiltrator, very interested, but the question i have is about the other weapons besides sniper rifles they can use. I had read somewhere that they can use scout rifles as well as sniper rifles. Can anybody give me any details about these weapons? Are they basically singleshot semi auto rifles? If so then im great with that, some of my favorite weapons have been single shot semi auto rifles . But was just curious, ive been watching a ton of footage from e3 and various other footage but havent been able to find any information about that, so any information would be appreciated , thanks.