I use a red dot reflex sight (without a riser) with my JG M4A1 rifle but occasionally forget to bring spare batteries while playing. I bought this accessory so that I would have a backup sight in case my red dot battery ever dies in the middle of a game.
For anyone who wants to use a red dot without a riser and still likes the option of using their iron sights, this is an excellent accessory for that purpose. This backup sight is fully made of plastic and lays flat when not in use. There is a thumb switch at the front of the sight that flips it up when needed. When in position, the sight looks and functions almost exactly the same as the iron sight on the carrying handle that came with my rifle. I say almost because the iron sight on the carrying handle had an elevation adjustment in addition to a windage adjustment. This sight only adjusts for windage. It does not have an elevation adjustment.
For the price and its intended purpose, this is an excellent buy. If you want a metal sight then expect to pay at least 2-3 times as much but if you just need a simple backup sight for an M16/M4 style rifle then get this sight!
Very low Profile when flipped down.
Easy adjustment for windage for both right/left handed people
Sturdy design, doesn't need re-adjusting once set.
Fixed elevation, cannot be adjusted.
Completely made of ABS plastic.