Introduced in 2023 Friction Pro have been around for a couple of years now. Made from NBR with a shore rating of 70 degrees. The contact patch is a solid raised 4mm x 4mm square, so similar in size to a Macaron. Comes with an Omega nub.
If you're new to Airsoft then one thing to note is not all hop buckings / rubbers work with every AEG. There's so many different brands which each have their own differences. It's worth trying a few different types and seeing what works best.