Greetings! I have wanted to purchase one of these Advantage Arms conversion kits for several years since I purchased a separate g19 2nd gen lower from Glock. I went down to Miami to see my friend who owns a gun shop and range and noticed he had two of them. Wow first time i have actually seen them in stock in a long time. I was a little apprehensive about finally buying one since reading the posts here about reliability issues but gave in and purchased it. It is the LE model. I installed it on my spare frame and racked the slide. It seemed a little sluggish so I racked the slide another 100 times. Seemed OK so I took it to the range today. My spare receiver has a 3.5lb trigger installed. The only ammo I have is walmart federal 550 bulk pack. I set the target at 53ft at the outdoor range. I loaded the mag, shot once and it jammed. Stove pipe. Cleared the jam, put the round back in the mag and thought "Ok might be my loading". Preceded to shoot another 200 rounds with no issues what so ever. I was shooting the first 5 mags without really aiming well just to break it in. Then I started to to slow fire, then double taps. I was able to keep all the rounds in the black circle of an official NRA 50yd small bore target. Must say I am very happy with the setup as it mimics my carry pistol. So if any of you are holding off because you have read posts concerning reliability, I say not all kits are affected or AA has fixed the issues. The kit I have says "Do not use with Gen4." Angel Wanna kill these ads? We can help!