GHK AUG Original Part# AUG-K-6

This is a GHK Original Part #AUG-K-6 for GHK AUG GBB series (20 inch Outer barrel + Inner barrel + Hop-up assembly), that already includes the flash hider, 20 inch marksman/ squad support weapon length outer barrel, matching inner barrel and hop up assembly, this would be a direct replacement for quickly swapping to a different barrel length to fit different mission requirements.