TNT APS-X Hop-Up System Barrel and Bucking Set for ASG CZ Series Gas Blowback Airsoft Pistols (Model: CZ P-O9)

"I got one for my cz p09, no problem fitting it.

"I wasn't really sure what to expect with this. I love my CZ and have not had any real issues with it. The barrel is about half an inch longer than the brass one that's installed, fits inside the outer barrel with plenty of room to spare. I haven't cronod it yet but the consistency has improved, the grouping is tighter, and it seems to be hitting harder. Just back yard at 65 or so feet but its denting cans a lot deeper now with the .25's. For me I'm happy with the upgrade, especially for the price.

"The barrel is better than the stock one, but the included bucking is terrible. The bucking makes a great seal with the stock nozzle, but it simply will not hop any bb's, they just dive into the ground as if there's no hop applied no matter the adjustment on the hop-up screw. Loaded bb's are not retained either, they drop out of the barrel with any downward tilt.

"Different experience than other reviewers. Barrel and provided bucking are just different enough than stock that it doesn’t seal well using stock hop up chamber. Inconsistent and low power was the result.