Hello, I am new to this forum and I have been recently following this thread. I recently bought an MBX pro series gun and I could not be happier. I will also add their customer service towards me was outstanding and thorough especially since I live in NJ and there were compliance issues. Adrien and David went above and beyond in my opinion, and I personally think they are very accommodating. As for the gun, I zeroed it at 17 yds and will be using it for steel challenge and USPSA. I tried 7 different loads of various bullet weights and coatings all using N320. All of my groups were tight as can be using a rest. I just wanted to add my two cents in because I am a very satisfied customer.