SA M4 B05

SA-B05 assault rifle replica by Specna Arms is made largely of a uniform zinc and aluminum alloy, reinforced with steel elements in the most vulnerable points of the replica (steel elements - all the screws, pins and tactical sling swivels). Both the SF stock storing the battery and the pistol grip were made of polymer. The receiver of the replica and the RIS handguard have undergone the process of anodizing, which guarantees a high degree of protection against corrosion. 

The replica features a quick spring release system, so-called Enter & Convert™. Due to that system, it is possible to rapidly and quickly adapt the power of the replica to the conditions expected on the playing field without the necessity to have the access to a workshop or a set of special tools - once the gearbox has been taken out of the replica’s body, the process of spring change lasts literally seconds.  

The gearbox which is reinforced on the height of the cylinder’s head hides a steel main spring guide which is the element of the Enter & Convert™ system and also 8mm ball bearings and steel thread-wheels which are placed on spacers. The system is secured with the use of four anti-reversals. There is a type 2 cylinder and the steel breaker. Replica is factory-fitted with and accurate, rotary type polymer Hop-Up unit that allows very precise and stable regulation of BB overclocking.