Luth-AR Gas Block & Gas Tube Alignment and Installation Fixture Gray. Designed to properly align the gas block and gas tube this fixture eliminates guesswork and makes installation fast accurate and hassle-free. By holding the components in perfect position it ensures smooth roll pin installation and a secure reliable fit. Perfect for gunsmiths or anyone building or maintaining an AR platform this fixture is a must-have tool for ensuring precision and reliability in every installation. Specifications for Luth-AR Gas Block & Gas Tube Alignment and Installation Fixture: Manufacturer: Luth-AR Color: Gray Features of Luth-AR Gas Block & Gas Tube Alignment and Installation Fixture Accurately aligns gas block and gas tube for proper installation Speeds up gas tube and roll pin installation Reduces the risk of misalignment or damage during assembly Durable reusable tool for professional builders and DIY enthusiasts Package Contents: Luth-AR Gas Block & Gas Tube Alignment and Installation Fixture Luth-AR GB-FIX: Gas Block & Gas Tube Alignment and Installation Fixture Gray