Have a 16 inch bushmaster carbine with carryhandle upper. Includes Bolt, bolt carrier, and charging handle. This is an hbar. The barrel is marked B MP 556 Nato 1/9 HBAR. Includes rear sights on the carry handle. As stated in title includes 820 rounds of Q3131 winchester white box. This upper has about 400-500 rounds through it. Email for pics. Asking 499 plus shipping.