Prometheus Stainless Hard Cylinder (Type A: Non-Ported) BBs & Loaders Extendable stock allows you to

Extendable stock allows you to adjust the length of a rifle to fits your body

fill stations

and other Tokyo Marui Clone compatible gas shotguns in mind

Especially the Upper Receiver can fitted standard scope claw mount which are Hensoldt Scope with STANAG claw mount and Low profile claw mount

Resembling the sensation of rubbing against a shark's skin

Prometheus Stainless Hard Cylinder (Type A: Non-Ported) BBs & Loaders Extendable stock allows you toUsing 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.