All partial AR-10 uppers are assembled with everything you need less the charging handle and bolt carrier group. CBC AR-10 uppers offer high-grain capacity and power in a versatile AR platform. Experience superior quality and exceptional performance from every upper assembly you purchase from CBC. Better yet, all of our CBC AR-10 uppers are custom built-to-order enabling us to provide you with the best prices you will find anywhere. The quality of our uppers are backed by our Lifetime Warranty – if any CBC upper assembly becomes defective, we will repair or replace it at no charge. Get your partial AR-10 upper at CBC today!