Whilst many in airsoft are just replicas of the real deal gear, acccessories, and guns it always a question if they are good copies. In many cases they are not but some are do it quite good in terms of external features. This also happens to optics as well in which they look good externally but rarely maintain the zero.

Crave24567 goes over a replica EOTech and compares it to the real one... "Just a brief look on the differences of the real eotech and the replica eotech for airsoft."