CNC Hopup Chamber M4A - PRO

The M4A Pro CNC Aluminum Hopup Chamber Unit (with BB Locking System) is precision machined to function accurately and consistently with most Tokyo Marui type (includes G&G, Krytac, except KWA ) standard M4/M16 AEGs.
*Compatibility:

• Nozzles 21.00-21.25 mm
• Most hop up rubbers on the market without losing FPS or dropping the BB.