Recoil Shock System M4 Enhanced Hop-up Chamber

This hop-up chamber is made by precision CNC machines.  It only fits Marui Next Gen. AEG: M4, M4A1, M4 CQB-R, M4 NSWC-Crane.  6063 aluminium and electroplating finishing strengthen construction and increase durability.  Dimension is enhanced to suit high capacity electric cable and for high frequency shooting.  Smooth surface finishing reduces friction with other parts.   This hop-up chamber does NOT fit Marui Next Gen AEG: HK416 series, MK18 and URG-I series.   All products are made for airsoft only.  They are not made for real steel firearms.