100% fit and function - Kaw Valley Precision Blow Back Bolt Carrier Group (BCG)

Just put together my first ar9 with a 16" Faxon Barrel, 8 oz generic mas defense 9mm buffer, stern defense glock adapter and this bolt. I had no idea what to expect but on two separate range trips this combination ran 250 rounds of S&B 9 mm and federal hollow points with 100% reliability . I didn't want to spend a lot of money but I heard it ar9s were finicky and decided I would not use any generic wholesaler parts besides the buffer and standard carbine spring. This combination of barrel bolt carrier group and Magwell adapter proved perfect when assembled in a leftover aero precision m4e1 stripped upper. I have since swapped over to a Anderson dedicated 9mm stripped upper. The nitride is extremely slick and uniform. Extremely nice appearance to top it off