Cmmg's fnh p90 flash hider is compatible with a short barrel on your ps90 sbr build.Finish: BlackType: Flash HiderModel: Flash HiderMaterial: SteelThread Pattern: M12x1 LH
The a2 birdcage flash hider is constructed of 4140 steel with a black finish.It is compatible with your 5.56x45mm nato ar-15.Finish: BlackModel: A2 BirdcageMaterial: 4140 Steel