2 Removable 6-rib Rail Sections For Placement Of Accessories

Front fiber optic w/ blacked out rear sight allow for quick target acquisition in low light conditions

like the FN M249

From 11MM clockwise thread to 14MM counter-clockwise thread which is commonly used on silencer or tracer on the market

PolarStar Fusion Engine for M60/MK43 Gearbox Series acetech 2 Removable 6-rib Rail SectionsThe Original HPA Rebel The Fusion Engine was released in 2011 and was the first new HPA system to hit the airsoft market in over two decades. This is the system that started the HPA revolution and has set the benchmark to which all other systems are measured. Although many have followed it, the Fusion Engine is considered by most to be the best. This system won "Best HPA Engine" the very first year Popular Airsoft added the HPA class to their Players'