Corsair unveiled three new gaming mice at CES 2019, and the Ironclaw RGB is the largest of these. Gaming mice of such dimensions and actually good internals are very rare in the market, but thankfully, the Ironclaw RGB is here to fill the gap. It's a huge right-handed ergonomic mouse that's mainly meant for palm gripping. The choice of materials is great, the surface finishes are nice and grippy, and the mouse feels very well made overall. The build quality is pretty much flawless. I found nothing to nitpick on. It could be a tad lighter for my taste as at about 107 grams, the mouse can be considered quite heavy, but with these dimensions, I don't think its weight is that much of an issue (even though a lighter mouse is generally better for your wrists).

Sensor-wise, the Ironclaw RGB has the potential to be absolutely astonishing. It's a very raw, responsive, and perfectly accurate sensor with a brutally high nominal perfect control speed. It doesn't have any speed-related accuracy variance either. The M65 RGB Elite features the exact same sensor without any errors, but unfortunately, the Ironclaw has some smoothing that is probably firmware-related, which won't concern most users, but can be a letdown for competitive gamers. Above 2000 CPI, there's at least +2 ms of input lag that's caused by the smoothing, and it increases at certain CPI levels, so I would highly suggest using the mouse below that value until this issue is fixed.

Buttons are pretty great on the Ironclaw. The main ones are rather light and tactile (with Omron switches rated for 50 million clicks), and just like the others, these have pretty much no unnecessary travel or play. My only concern is the middle click because its actuation force is rather high, making it quite stiff and tiring to use.

The cable is very stiff, thick, and heavy. It generates quite a lot of resistance and drag as well. This is quite unfortunate, and the issue is the same as on the M65 RGB Elite—I hope Corsair will look into this for a fix in future releases. As for the mouse feet, they provide a smooth and even glide with medium friction. Unfortunately, there is no replacement set included in the package.

I can only repeat myself with the software and lighting settings as they are identical to the Harpoon RGB Wireless and M65 RGB Elite. The software is rather heavyweight with a lot of customization options and a vast number of profiles, macros, and such. It's nicely designed overall, but feels a tad cluttered to me. Lighting is great on the Ironclaw as well: the scroll wheel and rear Corsair logo light up according to the settings you pick. There are a lot of different great-looking effects with bright and vivid colors and smooth transitions.

Overall, the Corsair Ironclaw RGB is a great mouse, and it can be a top choice for right-handed people with large hands who prefer a big mouse under their palms. However, it currently has some firmware-related sensor issues that should be fixed even though they won't affect most users. I would be happy to call this mouse an Editor's Choice without these firmware problems, but until these problems are fixed, the mouse only gets a Highly Recommended, which still means it's a great product.