Prometheus 6.20mm Delta Strike Barrel for Marui M4A1 / R.I.S. / SR16 / S-SYSTEM / SG551 (ALL+) (407mm) reg_US Superior performance with HFC134a/HFC22 Gas

Superior performance with HFC134a/HFC22 Gas and Crispy Blow Back with CO2 Gas

Marui Adjustable HopUp is located next to the ejection port cover0

6mm bearing Gearbox (Include Bearing)

Suitable For Maruzen P38 Series Airsoft Gas Blow Back GBB Pistol

Prometheus 6.20mm Delta Strike Barrel for Marui M4A1 / R.I.S. / SR16 / S-SYSTEM / SG551 (ALL+) (407mm) reg_US Superior performance with HFC134a/HFC22 GasPrometheus 6. 20mm Delta Strike Barrel for Marui M4A1 R. I. S. SR16 S SYSTEM SG551 (ALL+) (407mm) High grade precision barrel at 6. 20mm diameter for extra power and precision shooting Suitable for Tokyo Marui M4A1 R. I. S. SR16 S SYSTEM SG551 AEG Rifle For custom upgrade user, you can choose a longer barrel PROMETHEUS EG Barrel by LAYLAX (JAPAN) This allows for precise, long range shooting, with 60 70 meter accuracy at under 1J. Length: 407mm