it had to be strong and light in weight

they can be comfortably worn practically 24 hours a day

Complete with electronic trigger and MOSFET (programmable 3-shot burst)

Constructed of rugged polymer composite

KJ WORKS KP-18 TAN CO2 ZWILLING it had to be strongSPECIFICATIONS: System : Gas Blow Back Action : Semi Fully Auto Velocity : ~ 380 fps with extension Velocity : ~ 320 fps without extension Length : 180 mm Weight : 775 g Hop up : Adjustable Gas : CO2 Capacity : 23 + 1 FEATURES: Aluminum slide, Aluminum outer barrel, metal full size CO2 magazine, fire selector, and all metal internals High Impact Full Black Polymer frame Under barrel 20mm rail for accessory attachment extension inner barrel for