You definitely get your best bang per buck with this red dot sight. It's shell is made entirely of metal and comes with a convenient lens protector for both the front and the back (the lens protectors is linked with 2 rubber bands).
Highly recommended for any paintball or airsoft player.
Perfect fit for any picatinny rail and have an ergonomic feel to it. However, there was a minor defect in mine, the little solid cylinder that is supposed to tighten wasn't holding properly. Minor adjustments were done to make it hold correctly.