CRS125-24G-1S-2HnD-IN or CRS109-8G-1S-2HnD-IN WiFi Upgrade?

I have both of these routers. I was wondering if someone can swap out the wifi of these with R52nM So we could have 5ghz as well? I have not tried opening one up to look in side. I though I would ask if this can be done or not? The CRS125-24G-1S-2HnD-IN I am not getting very good connection with that one. But the 8g works great.

Thanks.
Keith Wisner
The Wis.