TacFire Pistol Length Micro Gas Tube w/Pin/Steel 5.25 in Stainless Steel Small. The AR15 Pistol gas tube is Heat & Corrosion resistant from elements to ensure consistent gas flow to help your rifle cycle properly. This AR15 gas tube fits most Pistol length gas systems. This is great if you're building an AR15 or sourcing parts for replacement or upgrade. It Pins into front sight or gas block No gunsmithing is required. Specifications for TacFire Pistol Length Micro Gas Tube: Manufacturer: TacFire Color: Stainless Steel Gas System Length: Micro Gas System: Pistol Length Features of Tacfire AR-15 Pistol Length Gas Tube with PIN - Stainless Steel: Strength and durability Heat & Corrosion resistant Consistent gas flow Fits most Pistol length gas systems Package Contents: TacFire Pistol Length Micro Gas Tube TacFire MAR009-MICRO: Pistol Length Micro Gas Tube w/Pin/Steel 5.25 in Stainless Steel Small