Shop › LANTAC MSPEC CARBINE GAS TUBE SS LANTAC MSPEC CARBINE GAS TUBE SS $18.99 LanTac USA LLC M-Spec Carbine Gas Tube, Fits AR 15 with Carbine Length Gas System, Stainless Steel Finish, Silver 01-MSPEC-GT-CRBN Quantity: Add To Cart Added! LanTac USA LLC M-Spec Carbine Gas Tube, Fits AR 15 with Carbine Length Gas System, Stainless Steel Finish, Silver 01-MSPEC-GT-CRBN