Prometheus Stainless Hard Cylinder (Type A: Non-Ported) color-ls321r-red No modification is required

No modification is required

It works with a metal hop-up chamber in which a hardened 6

Fiber Reinforced Polymer

competition-tested function to create the SpeedQB X PTS EPM midcap for the Airsoft M4 platform

This rail is lighter weight than your typical modular rail system

Prometheus Stainless Hard Cylinder (Type A: Non-Ported) color-ls321r-red No modification is requiredUsing stainless which have high hardness and high durability, and the surface having a heat sink for radiating heat which occurred at compression. It makes reducing an accelerating resistance caused by thermal expansion of Piston O ring. Also, they have variation for maintain air volume for various barrel size, and improving the stability of ability.