Product DescriptionThe Phase 5 Weapon Systems Lo-Pro Gas Block is a simple, low-profile replacement for a standard front sight base, designed to help you run a rifle-length forearm on a carbine-length barrel. Made from durable 4140 chromoly steel with a mag phosphate finish, this screw-style gas block fits 0.750" barrels and mounts securely using two set screws. Manufactured in the USA. Note: the gas tube roll pin is not included.Product Highlights Low-profile 0.750" gas block designed to replace an existing front sight base Screw / set-screw mounting for secure installation and streamlined fit under many handguards 4140 chromoly steel construction for strength and long service life Mag phosphate finish for corrosion resistance and a non-reflective appearance Made in the USA; includes gas block with two set screws (gas tube roll pin not included)Specs Brand: PHASE 5 WEAPON SYSTEMS Manufacturer Part Number: LOPROGAS UPC: 813318025043 Type: Low-Profile Gas Block (Screw / Set-Screw Style) Barrel Compatibility: 0.750" Material: 4140 Chromoly Steel Finish: Mag Phosphate Length: 0.95" Height: 1.48" Width: 0.90" Weight: 1.8 oz Country of Manufacture: USA Included: Gas block with two set screws Not Included: Gas tube roll pinDisclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product's manufacturer.