Let me just say first that this gun is a great gun. It just... Is lacking for the skirmisher and the poor-softer.
I bought this last year from a local dealer. The dealer warned me about using straight propane from those propane adapters. It also says clearly on the box to only use green gas and .25 weight BBs. Well I ignored that warning and now I see why that it's bad to do so. These are my experiences with the gun.
First, when I ran it on propane for about three full magazines with out the lubrication that is in green gas, it doesn't shoot the BB in the chamber. It will cycle the slide and keep feeding rounds in the chamber but somehow the nozzle will not propel gas to actually shoot the bb. The result is, about every five rounds, it finally fires all the rounds in the barrel and it pathetically sprays out like little balls of spit out of your mouth when you sneeze. Lesson learned. Use green gas. So I'm screwed because I live in Iowa which you can only get green gas through the internet. I'm also poor and lazy so I remedied this problem by shooting some gun lube from Remington into the nozzle. Then it runs like a champ... for about three mags. Then I spray in more lube.
Second, the Lube I sprayed into the nozzle ruined the hopup bucking. The hopup works and is adjustable but the accuracy is garbage as the BBs consistently go to the right or left at the point where the hop up perceivably kicks in. Despite the fact that I use cheap walmart crossman .20s, the hopup is optimized pretty much for heavier weight BBs like .25s. So all this is understandable. I'm sure if I didn't use the wrong lube or crappy ammunition the gun would shoot marginally well. Not fantastic, but pretty good.
Thirdly, the magazine, when I slammed one in with the slide open, the base plate on one one of them broke off. This is because the magazine base plate is held by thin metal rails that don't offer a whole lot of support when I slammed the mag in the gun. They broke. I cried. The mag looks ugly. Still works fine but now I'm really careful about how I put the mags in the gun. Also, the magazine release is plastic and it is prone to letting the mag slide up and down instead of being flush and solid. I wish KWA would have made this gun for idiots like me. Like perhaps securing the mag plate into grooves on the magazine or making the magazine release out of steel so it doesn't slide around in the gun and the base plate doesn't slam against the frame... This kinda seems like a no brainer to me. Why wouldn't they not do that?
All in all, I get kills with this gun. A lot of them. I feel like a boss with this gun when I run up to buildings and get quick kills. An extra mag helps. Get one, even though they are really expensive. The gas system is really great on gas, which is why I bought it. I also bought it because the ergonomics are based off the CZ 75, which is the most comfortable gun I've ever felt for my medium sized hands.
The trigger is sweet! I love the crispness of it. The gun feels like an extension of my arm. This is a great side arm and it gets more use than my primary because of my run and gun play style. It's great, but... I get the feeling that it wasn't designed with me in mind. I get the feeling it was designed for collectors who always wanted a CZ 75 airsoft gun. It's great, but finicky. It needs to be babied. But this baby is sweet. If you have the money to run this gun the way it was supposed to ran. Get it. If not, I'd look to KWA's more robust offerings, like perhaps their USP NS2 guns.
The KZ 75 is a diamond in the rough, a pretty good gun that would shine if KWA put it through another version with better, more user friendly upgrades. KWA, are you listening? I like your product but could you make them with the mind that people will be hard on them?
I'm Kirk Phillips. I enjoy the KZ 75 and I'm rough on my guns. Please take my opinion with a huge grain of salt.
Ergonomics are great for right hand users
Overall... yes, it is a robust gun
It's good fun
Accuracy could be improved (I'm not the only who thinks this)
Plastic where I'd like or prefer to be steel
Poor finish (on mine at least)
Has a strict diet of .25 bbs and green gas
Not designed with the common folk in mind (IMHO)
I give it four stars for what I can do with it.
Rating: [4 of 5 Stars!]