I was searching for a barrel for a 6gt gas gun and found MTE Machining out of Texas. I shot the company an email and got a prompt email back asking if I could talk. I talked directly to the owner barrel turner and gunsmith about what I was looking for and what I wanted. Jeff was quick to listen to what I wanted and offered me a solution as well as timeline that worked for me. He offered to assemble the upper and test fire it for a super nominal fee to make sure it met his expectations before shipping it out. Through out the whole process Jeff was always reaching out to let me know where I was in the queue/build sending me pictures and updates. When it was assembled and shot he sent me groups. When he sent the upper out he sent out his recipe for the loads that worked out of the rifle. Jeff has always been great to work with before and after the sale offering help etc. He also offers a hand guard that has built in arca rail the full length on it thats awesome. I have about 50 rounds through the build and it's shooting a 1/2moa. If you're looking for a barrel, full build, or an upper reach out to MTE Machining.