Bushmaster A3 with the carry handle and complete bolt group. The barrel has " B MP 5.56 NATO 1/9 HBAR" and has a bayonet lug. The Phantom was drilled and tapped. A allen screw was installed and the hole was filled with 1,200 degree silversoder. There has been 2-28rd mags down the pipe. It was very accurate and ran flawlessly. Sold pending funds. Pictures are available upon request. Please let me know.