I bought this KWA MkII about 2 1/2 months ago and my experience has been quite interesting. When I first received it, the slide would get stuck on the hammer which did not allow it to cycle forward. It seems like numerous customers had this same problem. I contacted KWA and they fixed it for me in less than a week. I also had a second problem when it was sent out to me because the slide lock would not engage when the magazine was empty. Again, KWA fixed it in less than a week.
After all this work was put into it, the gun worked perfect. Mine was chronoed at 330 FPS and I have had a few skirmishes with it and its extremely powerful and intimidating, The recoil on this gun is crisp and allows the shooter to follow up on the next shot quite easily. I purchased a blackhawk Serpa CQC 1911 holster and it fit perfectly. The only thing I noticed about using a blackhawk holster with this is that it scratches the slide slightly. The NS2 gas system is second to none and on a good day I can get 20-25 rounds per magazine on propane.
KWA makes some of the best products out there and this gun is no exception. The MKII is impressive and I always get compliments about how realistic it operates and how it's so loud.
Realistic, crisp blowback
No cooldown effect
Great gas efficiency
45 day warranty from a company that works endlessly for their customers
Possibility of having slide/hammer issues
Nasty orange tip (but legally necessary)
Had to send in twice
Rating: [5 of 5 Stars!]