I purchased this red dot sight last month on Amazon.com for $48.99 and tried it out on my Keltec PLR16 at the DSRPC range. Selling it because at 100 yards (in the bright sun light) the four different reticles are barely visible even at the highest power. As I'm pushing 79 and wear glasses I sometimes also had the same problem at 50 yards. Can't guarantee it will work any better for you at these distances, so no refund on this item. Asking $25 or 20 .223 rounds. The sale/trade will take place at my location in SW Las Vegas, vicinity Flamingo & Jones intersection. A posted I'll take it trumps a PM.
