Maybe in 2.75 (without the damage set to 250% like mine) the PSG sucks, but in 2.8 damage will be more location specific, so in most cases you could probably take someone down with one 7.62 to the chest, too. Plus the firing rate will be upped so you can take out multiple targets much quicker than with the robar (which has a bolt action and huge recoil), and I don't think the zoom is quite correct in 2.75, I'm betting it'll be a true 6x scope in 2.8. Then there's the bigger magazines, better handling (holding a 20+ lb gun like the robar steady with no support can be challenging), etc.
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Shot four puppet governors in a line,
Shook all tha world bankers, who think they can rhyme,
Shot the landlords, who knew it was mine,
Yes, its a war from the depth of time!