Was looking for a moderately priced red dot for one of my ARs to play with. Found a "Bushnell TRS25" on ebay for $63. Right away I should have realized something was wrong. That's about 40-50 $ cheaper than the lowest price you can find anywhere else. But I ordered it anyway. It came in 4 days. Red flag #2-Basic black box with no Bushnell markings what so ever. Red flag #3-No Bushnell markings on the instructions Red flag #4-the windage adjustment screw didn't work. I contacted the seller and told them that the windage screw didn't work and was immediately issued a refund through paypal. It was only then that I started looking at the difference between real TRS25s and knockoffs. 1. Packaging-The real Bushnell packaging is clearly marked and larger than the fake. The fake usually comes in a small box which may or may not have "Bushnell" on it. Sometimes the fake will have a "Bushnell" sticker, sometimes not. 2. Looking into the front of the optic, the real TRS will have the laser projector at about 5 o'clock the fake one is about at the 2:00 position. 3. Taking off the adjustment caps, they are marked "1/2 MOA " and an direction arrow inside on the real one, the fake one has no such markings. 4. The battery is held in by clips and the battery cap has 2 "O" rings on the real one. The battery is loose and only one "O" ring on the fake. 5. The "Bushnell" marking is larger on the side on the real one, it is smaller on the fake. 6. There is a registration number on the bottom of the real one, no such number on the fake. I should have known better that if it's too cheap it's probably not real. Lesson learned and ultimately I got my money back. Buyer beware. By the way, there are a number of videos on youtube which shows the difference between real and fake. I did just ordered a Holusun HS407 from PSA, it was $100+ more but hopefully will be the real deal.