Alpha Parts Stainless Steel 10.5-14.5 inch Gas Tube for Systema PTW / M4 GBB

Alpha Parts Stainless Steel 10.5-14.5 inch Gas Tube for Systema PTW / M4 GBB Stainless Steel Construction Design For Replace the Original Parts Suitable For Systema PTW M4 Rifle/ M4 Gas Blow Back GBB Rifle ( Outer barrel length: 10.5" - 14.5")