Made of lightweight aluminium alloy, the First Factory lower receiver is designed to withstand the vibration and shock of the Next Generation Recoil System.

Compatible with: Tokyo Marui Next Generation M4 Series

Note:

• This product can only be installed on the First Factory or Standard Tokyo Marui upper receiver.
• The upper spacer (NGM4-119) and upper stopper set (NGM4-120) may or may not be required depending on the exact fitment with other parts installed.
• This is NOT compatible with the HK416 series.
• Due to manufacturing tolerances there may be some play or a gap with the upper receiver.
• Some modification may be required for smooth operation.