Black Anodized exterior finish

Quick locking system receiver plate

Num Most Commonly Used With Tip OAL 1

Easy to install that only takes seconds

This is the GEN 4 edition of the full frame Glock 17

MAXX M4A PRO Hopup Chamber FMA Black Anodized exterior finishCNC 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