The Falkor Defense Petra .300 Win Mag looks like a great rifle. I also love the Daniel Defense guns, Barrett Rec7 (Piston and 2nd Gen. DI), ADCOR, LMT, and a new acquisition - the Christiansen Arms AR with the extra carbon fiber parts, shoots very well and is very light weight. On the other hand that LMT CQB piston rifle is overly heavy as is the HK MR556. Keep up the great work. I still love piston rifles. The original Ruger was my first piston gun and it was quickly followed by the LMT CQB, HK MR556, ADCOR (which I LOVE), and SIG 516. I also very much like the original SIG 556 rifles, even though they're NOT AR platform rifles they are very well made and accurate. They might be a little pricey, but they make up for it in quality and dependability.