LANTAC AR-15 Gas Tube Plus 1 Length Black. Precision manufactured from 306 stainless steel extruded tube. Lantacs M-SPEC gas tubes offer the shooter a mil-spec high quality product at a competitive price point. Specifications for LANTAC AR-15 Gas Tube: Manufacturer: LANTAC Gun Make: AR Platform Gun Model: AR-15 Additional Features: Gas Tube Features of LANTAC M-Spec: Comes complete with Gas Tube Roll Pin Package Contents: LANTAC AR-15 Gas Tube What firearm models does the manufacturer say LANTAC AR-15 Gas Tube is compatible with? The manufacturer suggests that LANTAC AR-15 Gas Tube is compatible with AR-15LANTAC GT-R60005: AR-15 Gas Tube Plus 1 Length Black