Geco Open Red Dot Sight

Light, compact and robust open red dot sight.
 Ideal for compact and light weight setups.

 Worst case scenario tested on the glass with 1 joule .25g bb (SpeedQB rules) point blank. Glass survives with a light dent.
 I don't believe this situation will ever become realistic, but this gives you a good idea of what the glass can take.

 Asking price includes picatinny rail as shown in the photo.

 Specification of supplier can be found in the link.
*Link deleted*