I had been wanting to purchase one of these ever since I heard of Adams Arms. I was already an owner of a piston AR. I had previously purchased a Stag Arms Model 8 Gas Piston back in 2012. Although I am pretty happy with it, the piston system on the Adams Arms is superior in my opinion.
Today was the first time I fired the pistol. I only was able to fire 40 rounds through it as of today. I am both happy, and relieved to say that I experienced zero malfunctions. After seeing some of the problems some people were having with their Adams Arms rifles, I was a bit apprehensive after I had purchased it. I hope to fire even more rounds through it to test it further in the very near future. As a side note, I am using Break Free CLP as my lube of choice, and I lubed the pistol before heading to the range today.
One thing I am not 100% happy with, is the fact that the gas block sits very slightly lower that the rail. For me it matters very little, because I am running the polymer Magpul BUIS, and putting the front sight on the gas block was not an option anyway. All in all, I am very happy with my purchase. I will report any issues I may or may not have in the near future.