The diameter of Specna Arms CORE is 5.95 mm BBs (+/- 0.005 mm) and the difference in weight between BBs does not Exceed 0.01 g. It makes them ideal for replicas with a A very good focus shots of is provided to the ideal shape of each Specna Arms CORE BB.

A meticulous quality assurance and a high-gloss polish guarantee a problem-free feeding of BBs from all sorts of magazines and a stable spin of the BB to the Hop-Up system.