I'm certainly no expert, but as someone with a serious jones for the G18 here is my take on it's use. I think it would make a great daily carry/duty weapon. It is the same size/shape at the G17 and selectfire. The gun would be used just as a regular pistol would be, but if the big SHTF big you would have the option of fullauto. Lay down a burst of suppresive fire and get the hell out of Dodge.