The Lightning Banjo by S2 Airsoft Designs is an upgrade part for Fusion Engines that dramatically improves air efficiency by improving poppet movement speed

The Nineball tight bore steel barrel for gas blowback handguns is the result of all the accumulated technologies and experience gathered from the Prometheus EG barrel series

Licensed trademark of Heckler & Koch GmbH

Direct OEM replacement part

Optional 20mm lower accessory rail

MAXX Model Airsoft CNC Aluminum Hop-Up Chamber AEG Series M4A - PRO (Red) maxx trigger The Lightning Banjo by S2Maxx Model CNC 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