Jumped on the deal for the Ballistic Advantage .224 Valkyrie barrel and free Toolcraft BCG. Very impressed with the final assembly. Charging the completed upper feels super smooth and I have no doubt the combo will serve me well. Kudos to Acme Machine for being very helpful with my questions. I even received a phone call to answer my questions. Bear in mind I am currently on Guam and was told there was no problem shipping the items to me. Shipping to me took less than a week. Thanks Acme team for a smooth and solid transaction. Highly recommend.