The KM4 AEG hop-up assembly fits all KM4 Series rifles

Momentary End Cap Switch and it also comes with Remote Pressure Switch

but it does have its benefits in the form of power and efficiency

or laser at a 45 degree angle

Condor TRIPLE PISTOL MAG POUCH Color:Ranger Green The KM4 AEG hop-up assemblyTRIPLE PISTOL MAG POUCH The Condor Outdoor Triple Pistol Magazine Pouch features a universal design, to fit practically any pistol magazines. Essential elastic retention and the adjustable top hook and loop flap closure securely keep the magazines in place. The flap closures can also be tucked away and be used in the open top orientation. The Condor Outdoor Pistol Magazine pouch provides optimal storage for most pistol magazines. It can also be used