Pinty Buster quick thoughts.
I pulled the barrel on my Pinty Buster and inspected it. I did not check for barrel port diameter but what I did like is the barrel port is beveled so if there is a slight alignment issue, the flow shouldn't be restricted. A factory version of the port in my Notos barrel I had to fabricate. I attempted a small hammer weight but I'd have to get a shorter spring, which I don't have. I have no plan to port as I don't want to mess with the warranty. The barrel came CLEAN, like I ran thru it with a patch worm and it had no dirt(Hatsan should take note). I adjusted the hammer spring as far in as it will allow and I get 725 fps average on Norma heavy, 750 fps on H&N 15.9, 770 fps crosman ultra magnum 14.3. The grip is soft and feels great but separated at the top as nothing holds the rubber to the block. They missed on the grip. Removal and install of the barrel, and hammer spring was easy. I did not go any further. The barrel has 2 set screws atop, one more for the pic rail/barrel guard that sets into the barrel. The trigger grip is one screw from the bottom and the hammer adjuster spins off after the grip is removed.
The air cylinder for the Buster is almost Exactly the same size and diameter as the Notos a 66cc stock tube. 100cc is BS, no big deal it's simply false advertising.
3.5/5 Stars, if the grip was not sloppy and the air cylinder size correct it would be closer to 4.5 stars.