This is a high-quality replica upper receiver set by VFC and is designed for VFC AR / M4 GBB Airsoft rifles. This allows for easy conversion solutions for VFC's AR / M4 GBB Airsoft rifle lineups. The DD Rail Interface System (RIS II) was designed at the behest of the United States Special Operations Command (SOCOM) for the SOPMOD II program. SOCOM had a specific requirement for a free-float M203 solution, and Daniel Defense responded by designing an innovative system to meet the government's need. The DD RIS II allows individual operators to free float the M203 grenade launcher without additional parts. As important, special tools are not required to mount the M203 grenade launcher. This was accomplished by integrating all of the needed parts to free float the M203 into the rail itself. The upper receiver set is compatible with V2 and V3 VFC M4 / AR GBB Airsoft rifles, and is a simple drop-in installation.
Please note that the upper receiver set does NOT come with a bolt carrier group.
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