Thanks to my firefly hop rubber, I got into my top choice for university!
I met a beautiful wife who cooks and cleans for me, I got an amazing high paying job, and I became far happier with my life!
I can honestly say I'm a different person after switching to firefly!

I've heard that for 350 fps it is ideal to use a soft hop-up bucking but for higher FPS such as 400 it's better to use a hard one. What is your opinion on this? And do you find it's best to match the hardness of the bucking and the nub or sometimes mix and match?

I wanna add to that, what FPS range is good for the extra soft hop-ups?

I follow the recommendations.

<300fps.

I was under the impression that soft buckings worked best up to ~400 FPS while hard buckings were for ~390+ setups (there is some overlap obviously it's not like it's a totally discrete difference between 399 FPS and 400 FPS).

I've always stuck to:

<300fps: Extra Soft
300-350fps: Soft
>350fps: Hard

But you're right, there is some overlap, and the rules are not completely defined and set in stone. You can definitely use a Soft rubber at 400fps as well, but you'll just have to turn the hop up a bit higher to get it to engage.

I thought there was a medium grade as well?

There may be... I'm just not aware of it. Doesn't mean it doesn't exist, though

Firefly has a medium nub available but thats all the medium I've come across so far.

Yeah, they do. I actually have one in stock. I've just never seen a medium rubber itself. Only extra soft, soft, and hard.

ololol

pepper - YouTube

After browsing around on the forums a lot of people seem to believe the Mad Bull 60 Degree Shark Bucking Hop-Up set is one of the best.

http://www.airsoftparts.ca/store2/in...roducts_id=962