The Sharps Bros SBUR04 Billet Upper Receiver is made from billet 7075-T6 aluminum and Mil-Spec Type III hard coat anodized black. The SBUR04 has a Mil-Spec front end that is compatible with any AR-15 barrel nut and any AR-15 handguard out there, including those with rear facing tabs. The receiver can be used for .223, 5.56, .224 Valkyrie, 300 Blackout and 6.5 Grendel calibers. Port opening is not large enough for 450 Bushmaster, 458 SOCOM or 50 Beowulf. Both sides of the receiver have 'SHARPS BROS.' discretely engraved. Includes installed forward assist and dust cover.
Weight: 9 oz