"Just got this on and shot it.
Before I begin: I do know that guarder slides require fitment unlike some other brands, and because of that I knew what I was getting into before buying it and so will not take stars away.
I know this slide will not crack, so I'm doing an immediate review upon a first shooting/fitment.
All shooting was done with a tokyo marui 4.3 magazine, using propane and charged for about 4-6 seconds.
Finish:matte black, flat finish and feels amazing, exactly what I was hoping for.
Weight: pretty darn light, when I was doing some test shots my gas consumption was little to no change when seeing how much shots I could get.
Fitment: immediately upon receiving I slid it back and forth no problem without a blowback housing (BBU). However when I did put my BBU (stock tokyo marui) is when the problems began. Whether it was just mine or for all 4.3's I didn't have the part that needed to be cut off. You may want to lightly file the inside of the slide, and then file the bottom left of the BBU (if looked at with the front of the BBU facing away from you) with that being said, when I put the slide with the BBU on immediately I had a fitment problem. I instead jammed it on a few times, and what you'll need to do is lightly file the outer parts of the rails on your lower frame (at least that's where mine was making contact) or just keep racking it and eventually it will loosen up.
Mine still is a bit stiff, but when fired it does not affect shooting performance and will probably work itself out.
Sight fitment: due to my BBU's screw being stripped I did not put my sight on, I did try to fit it on anyway for the sake of this review.
I'm not sure if I was doing it wrong, but it's almost impossible to fit the rear sight inside. As for the front, it is easy but you may just need a little force. I was able to fit it in with both of thumbs pushing on the sight.
Recoil:a lot more than my plastic slide, of course. My arm actually flinches a bit with this slide, but I'm also using a atronger spring that basically short strokes the gun.
Overall virdict: if you have worked on pistols before, or have a lot of patients to take apart, file, put it back together, repeat. Know how to fit sights correctly, and want a beautiful slide and don't mind doing a bit of work. I highly recommend this slide for your 4.3.
I only took a star away because I did have BBU fitment issues, which I did not expect to happen and is why I warned of it in my review.