The standard F2 poppet is equivilent to the Red Low-Flow poppet of the Fusion Engine

 The LM4 RIS PTR buffer tube has the same diameter of a MilSpec Stock which allows operators to customize to their weapon configuration

Using a stock VFC M as a test platform

SPEED: 410 - 420 FPS

PVC American Flag patch

PDI 6.01 Steel 4.3 hicapa inner airsoft trigger The standard F2 poppet isHigh quality SUS304 stainless steel construction minimizes vibration Precision tightbore 6. 01mm (+ 0. 002mm) inner diameter Improve accuracy and consistency of your gun Smooth polish to reduce friction Improved air seal and compression increases power Made in Japan