Product DescriptionThe Wheeler Delta Series AR Upper/Picatinny Rail Vise Block is a versatile gunsmithing tool engineered to securely hold AR-15 and most AR-10/LR-308 upper receivers. It can engage the takedown lugs on the bottom of the receiver or clamp directly to any Picatinny rail on hi-rise or standard flat-top uppers. Built from durable extruded and machined aluminum with precise tolerances, this block delivers a solid hold for removing stubborn barrel nuts, aligning free-float handguards, and a wide range of shop tasks.Product Highlights Multi-function design holds AR-15 and most AR-10/LR-308 uppers Clamps directly to any Picatinny rail on flat-top or hi-rise receivers Extruded and machined aluminum construction for strength and durability Ideal for aligning free-floating tubes to the upper receiver rail Optimized for use in a sturdy 6-inch or larger bench vise Specs Product Type: Upper receiver/Picatinny rail vise block Compatibility: AR-15; most AR-10/LR-308; any Picatinny rail interface Material: Aluminum (extruded and machined) Color: Black Weight: 1.25 lb (shipping weight) UPC: 661120568889 Manufacturer Part Number: 156888 Brand: Wheeler 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.