 To install it, drop ALL the .3dz and .tpc files to the game's directory, as the gunsight shares many things with the cockpit 3dzs. I also did a new cockpit opening handle too. The gunsight is the "OPL RX 39" also known as "viseur lanterne". Enjoy!																	                                                                                                     cwrio@novanet.com.br - C. Wilches