Product DescriptionThe Real Avid Lug-Lok Upper Vise Block is a purpose-built gunsmithing fixture that secures AR-15 upper receivers by engaging the barrel&&';;s star-chamber locking lugs. Machined from 7075-T6 aircraft-grade aluminum with a non-marring satin silver finish, it redirects torque forces away from fragile receiver surfaces to the steel lugs for safer assembly and maintenance. Adjustable stainless-steel vise pins and an upper receiver lock knob let you set and hold the ideal working angle, while an alignment flange speeds setup. Designed for standard .223/5.56 AR-15 uppers, this durable tool is ideal for building, installing barrels and muzzle devices, and general maintenance.Product Highlights Engages star-chamber locking lugs to secure AR-15 uppers without clamp-style blocks 7075-T6 aircraft-grade aluminum body with non-marring satin silver finish Adjustable vise pins and lock knob hold the receiver at the optimal angle Includes two stainless-steel vise pins; alignment flange for precise setup Designed for standard .223/5.56 AR-15 upper receivers Specs Product Type: Upper vise block/fixture for AR-15 upper receivers Compatibility: Fits .223/5.56 AR-15 uppers Material: 7075-T6 aircraft-grade aluminum; stainless-steel pins Finish/Color: Satin silver Model/Series: Lug-Lok, Upper Vise Block Key Features: Star chamber locking lugs; upper receiver lock knob; alignment flange; vise pin and lock knob retaining holes Weight: 1.35 lb UPC: 813119012471 Manufacturer Part Number: AVAR15LLVB Brand: Real Avid/Revo Disclaimer: 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.