The ERATACA(R) backup-sight has been developed to offer a rugged and robust sight to withstand roughest conditions while offering at the same time the precision of a competition shooting sight. The combination of steel parts where absolutely essential and high grade aluminum parts wherever sufficient, gave us the possibility to implement a sight with minimalistic design, low weight and minimum height. Thanks to a special surface treatment all parts are corrosion resistant to withstand even maritime conditions. The spring-loaded folding mechanism reliantly protects the sight from damage when used under rough condition in the field. A backup-sight must enable the shooter to aim t Mfg: Eratac