Appears to be a quality product. Installed in my new Davidson Defense 7.5” pistol build with no problems. I left the buffer retaining pin in and the Armaspec Recoil Spring still was easy to install. I used the H2 equivalent Spring set and it worked flawlessly during my 100 round break in using PMC 5.56 ammunition . I couldn’t tell if there was any sound reduction because of the massive muzzle blast; but there definitely was no TWANG sound. With Ballistic Deal’s sale price and Armaspec’s lifetime guarantee this is a deal that can’t be beat. I am placing an order for another Armaspec today. Time will tell, but I don’t think I will ever go back to the other brand that costs twice as much.