Sharps bros.Upper receiver ar-15 billet w/dust cover
-This receiver is meant for .223, 5.56, .224 Valkyrie, 300 BLK & 6.5 Grendel calibers
-Will not fit 450 Bushmaster, 458 SOCOM or 50 Beowulf
-Made from billet aluminum
-Weight: 9 oz.
Other Features: For ar-15,.223/5.56mm/.300blk and 6.5 grendel builds, machined from billet 7075-t6 aluminum and comes with forward assist kit installed and dust cover