Definite hidden gym! - DI Optical FC1 Red Dot Sight

I happened to hear about this product from a youtube review and decided to roll the dice on an unknown brand. When I first opened the box I was shocked at how tiny it was and almost returned it (I was expecting from the pictures it to be close to size of an EOTech but it's not even close) anyway the mount it supurb and the dot itself is crisp. I only gave it 4 stars because I have yet to take it to the range for zero confirmation but I doubt it will have any problems. One negative is the battery compartment which resembles a CD player tray only u have to unscrew it with a tiny phillips head screwdriver. The battery life isn't the best either so not sure if this is a SHTF optic like an Aimpoint or Trihicon. But overrall I am impressed with it and if it holds zero at the range I might get another down the road.