Production Model : AIP007-43-R - Aluminum Construction (CNC Machined) - All inessential parts has been remove to keep the lightweight - Suitable for Tokyo Marui Hi-Capa 4.3 Series Airsoft Gas Blow Black GBB Pistol - Supreme Quality & Lightweight Achieved - As always, upgrading GBB require necessary skill & technique, consult expertise if needed Major Color : Red Built Material : Aluminum