Things I liked:Extra Rails for Accessories, high capacity magazine. Things I would have changed:Shorter Trigger pull. What others should know:Long trigger pull will keep your finger rubbing the trigger guard. Does not seem to be as powerful as advertised(520fps) compared to my 15XT (480fps).
Things I liked:Read other reviews for this product, really powerful. Has loud bang and power like my 622x but without the kick.Blows up targets into pieces. Things I would have changed:Add more metal. Increase mag capacity. What others should know:Purchase this together with extra clips to save on shipping. You can add red dot scope by glueing a rail on top of the barrel. I used B Square shotgun rail cut to fit on the barrel. Almost perfect fit.
Things I liked:Powerful and loud like my 622x but without the kick. I bought the 5170, advertised as 520fps but this 617x and my 622x are alot more powerful. Things I would have changed:Add more metal and higher capacity clips. Add rails for scope and laser. What others should know:Buy this gun with extra clips.