Kythera SA (Semi Auto) - Blemished MODEL:V2 (M4/M16) - #1 Nozzle The Black Poppet valve is

The Black Poppet valve is the highest flowing valve available for the Fusion Engine™ and is the valve which that engine comes with as standard

Why does that matter

ICS SIG 550/551/552

The Fusion Engine has an approximate 60 - 100fps window of adjustment depending on the barrel length being used

Incorporates PolarStar's proven compact regulator design which uses only 2 o-rings

Kythera SA (Semi Auto) - Blemished MODEL:V2 (M4/M16) - #1 Nozzle The Black Poppet valve isWe have a limited number of blemished Kythera V2s available at a substantial discount. During each production run there are always some parts which do not pass QC inspections. In some cases these parts are dimensionally out of tolerance and unusable so they are scrapped for recycling. In other cases the parts are completely functional but have minor defects in "Class A" surfaces. These blemished systems are factory new but built with one or more parts