This is an action toy, with some die-cast metal parts, from the Gundam universe.
The original RX-78-2 design has been lovingly recreated by Bandai as part of their Fix Figuration line. The RX-78-2 an enormous amount of accessories such as two bazookas, two rifles, a shoulder cannon, two beam sabers, a shield, a transformable core fights and best off all optional armor parts that allow you to have your RX-78-2 look like it did at the start, middle, or end of the One Year War. No scale is given, but it stands 180mm tall. The Gundam is supposed to be 18 meters tall, so that's about 1/100 scale.
Please note that the photos shown are of a prototype; the production version may vary. Also, items such as this are mass produced and as a result some inconsistencies in finish and painting may occur; these are not considered manufacturer's defects. If you absolutely must have perfection, prepare to do some touch-up work on your own.