Angel Custom CNC "H-Hop" Hop-Up Spacer For All Airsoft AEG
(Set of 2 / Black & Clear)

"Fits into hopup unit and worked great.

"Just like the other guy said, H-nubs are extremely good. An H-nub with flat bucking gives twice as good results as a flat hop setup in my tests. The only thing is that an H-nub can only hop up to about .32g. before it starts deforming the bucking. Otherwise when you take out the bucking you'll find 2 dents from the nub legs. I wish they still made the polarstar/scs concave spacers, because those are the most ergonomic for your BB. Those wouldn't bend the bucking too much. For BBs above .32g, you need R-hop, which is about the same accuracy. I never got flat hop to work, it always shot very badly, but I got Rhop to work, when used with a concave nub (not the polarstar ones, just a flat nub with a surve) .

I wouldn't buy these though, they're over priced, you can 3d print one or buy from aliexpress for $1 each.

"Super consistent and hugs the bb better than a regular flexible rubber one