Mn Doggie, the Colt and Umarax are aluminum and built like an air gun, they do have metal, but it is by no means a good design. Mossberg has an all plastic AR look-a-like, but it is just plastic over an old 22lr designed rifle and it feels like plastic. S&W has a better design over all and feel, I've held all of the above three, I like the Colt and Umarax (but not the guts), the Mossberg I would touch, looks cheap and feels like a toy. Again just my opinion.. PS the colt has a pencil thin barrel inside of the outer barrel, it is a airgun make over, really bad as far as build... Good Luck.