- New Blow Black System for Marui 5.1/4.3/1911Series - Adjustable Blowback part for turning original Blowback to Light Low Blowback - Multiple cut-outs to reduce weight - CNC 7075 Aluminum Construction - Increase operating speed and improve efficiency - Suitable for Marui 5.1/4.3/1911 Series Airsoft Gas Blow Black GBB Pistol
