G&P - (GP-BRL060) M4A1 16″ Taper Outer Barrel (Thick) Collapsible Shark Stock but a lot of AK

but a lot of AK AEGs are like that

Marking On Both Slide

Length    770mm / 850mm (Extended)

SKU G-FTK-29 Major Color Other Built Material S303 Stainless Steel/Brass/Polycarbonate/Aluminum/Acetal/Steel Package Includes SP120 Spring (Oil Quenched/Tempered Si-Cr Alloy Steel Wire) Polycarbonate Piston Air Seal Nozzle Ball Bearings Spring Guide Polycarbonate Ventilation Piston Head Stainless Cylinder Head Lucid Chromium Plating Cylinder Original Type Steel Gear Enhanced Tappet 6mm Steel Bushing Shim Set Taflon Grease Manufacturer Guarder Hop-up N/A Shooting Mode N/A Gearbox Type N/A Fit Battery Pack N/A Bullet Type N/A Pistol Power Source N/A

G&P - (GP-BRL060) M4A1 16″ Taper Outer Barrel (Thick) Collapsible Shark Stock but a lot of AKCOP009B>Taper Length: 418mm 16 Material: Aluminum One Piece Barrel 14mm Clockwise Only can fit G&P Taper Metal Body Fit for G&P Front Set RAS series