Maxx Model CNC Aluminum Hop Up Chamber M4A for M4 - M16 Marui & Similars Rotary Hop Up by Maxx Model Negrini Boccole cuscinettate da 7mm

Boccole cuscinettate da 7mm

M4 high performing rotary hop up chamber

Retractable stock allows for a more compact overall size and lets you adjust the length of pull for ideal comfort

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Maxx Model CNC Aluminum Hop Up Chamber M4A for M4 - M16 Marui & Similars Rotary Hop Up by Maxx Model Negrini Boccole cuscinettate da 7mmCNC Aluminum Hopup Chamber M4A Pro (with BB Latching System) unit is precisely machined to perform accurately and consistently on Tokyo Marui (include G&G, KRYTAC, except KWA) Standard M4 M16 AEG series. The Hopup Chamber M4A unit is built with an aluminum Rotary Dial Knob for fine hopup adjustments, the precision Hopup Lever and 4mm Bucking Nubs (6mm Bucking Nubs are optional) to perform best with R Hop and Standard Hop to keep the BB shooting