The BBA APFG MCX Hop Arm from Bristol Based Airsoft is an aluminium hop arm with a concave profile, designed to get more accuracy and range out of the APFG MCX GBBR series. Its profile lets you run .25 g to .32 g BBs and beyond. Which weight works best depends heavily on your bucking and power limit.
Fits: APFG MCX GBBR series (including Legacy, Virtus and Spear LT) and the Maruyama ISO556 GBBR. Does not fit the original APFG MCX Rattler SBR/SOCOM, because of its short adjustment arm.
