Parts for Airsoft M4
The M4 is the heart of modern airsoft—so we offer specialized parts and upgrades that squeeze maximum realism and performance from your gas-powered M4. Choose from CNC-milled uppers and lowers for greater body rigidity, precision inner barrels (6.01–6.05 mm) for consistent groupings, or complete hop-up units with TDC adjustment that keep each BB on course even in windy conditions.