With HPA -+ 2-4 FPS, with CO2 ever so often I see shots it'll drop 10-20 FPS, didn't test much on CO2, but others state they get about 100 fps drop ever so often. (You're also able to adjust the FPS from 300-400 roughly, CO2 increase your FPS significantly.)
HPA is more consistent so that's what I recommend for people to run. It's a dosed amount like P*, coming straight from the Tank to your line and into the gun at 800 PSI. P* are regulated at 50-120 PSI.
Stock I got great results, didn't dial in the hop-up, cleaned / lubed out of the box, took it to Mach1, was able to get kills easily with the 14.5" setup from one end to the other. Outdoors I haven't tested, and most likely won't. I do believe the stock bucking is a G&G bucking, inner barrel is unknown.
Have a new ORGA 6.23 wide bore and Maple Leaf Bucking 60 degree currently installed with a 75 degree on the side. Haven't shot it in the "SBR" setup. Widebore will take advantage of the airflow how the P* does.. No one has concrete stats, but before my personal life came up, this was my theory to test the 60 and 75 degree bucking's alongside the ORGA. Most likely won't have the chance or time to test it outdoors atleast for data, as it's For sale.
If you're interested in mine, we can work something out
