I purchased a Flattop M4rgy at the Grand Rapids, MI gunshow in January from them. I then got a Bushmaster stripped lower from my local FFL. The rifle went together perfectly and although the barrel is not chrome lined, I have not had any failures running over 2K of crappy Wolf thru it, I figure cheap rifle = Cheap ammo ;-)
The only issue I had was the buffer fell apart after 500 Rds of so do to lack of a pin thru it. They gladly replaced it without my even showing them a receipt. I was very impressed. The guy at the gunshow that sold it to me was very helpful and really guided me thru the process of building it. I was worried about doing it, but it was actually quite simple and left me wanting to build another. I figure that I have a nice rifle for under $700 that’s my favorite one for the range.
I highly recommend M & A Parts!
Eric