da Vinci Barrel is developed to R-HOP system.
Wide HOP window 4.7mm x 6.7mm
Muzzle end ,10mm Tapered crown to get smooth air.
This barrel was developed with JAR-MIX militaria,they gave us the design and feedback the shooting results.
This barrel is made of stainless steel (SUS304)
Internal Dia. : 6.01mm
Outer Dia. : 8.55mm
Tapered length : 10 mm