CNC ALUMINUM HOPUP CHAMBER M4T ONE (FOR TM MWS M4)Product Description CNC Aluminum Hopup Chamber M4T One unit is precisely machined from a solid Aluminum block to perform accurately and consistently for Tokyo Marui MWS M4 Gas Blowback Airsoft Rifle. The Hopup Chamber M4T One is fully compatible with most GBB Rubber Buckings without losing FPS or dropping BBs ensuring the BBs shooting accurately and consistently on every single shot. The Hopup Chamber M4T One is also equipped with the Aluminum Locking