Azodin Blitz Red Dust
Check-it Surefit Feedneck
3A 3000PSI HPA
Richochet 2K (VL Revolution Eye-force in mail)
It sure fits
Not snug with all hoppers
I've used a halo B and a richochet 2K on here, and it seems the harder plastic neck of the halo holds a lot better than the richochets thinner neck. I have to tighten the hell out of the thing to hold my richochet (back up) hopper, but it still doesn't feel that secure on there. But on the Halo, i have to make sure i dont overtighten, or i'm afraid i'll crack the neck.
It's not perfect, but it's pretty close. Like it, love it, wouldn't buy another one until the day this one breaks or doesn't hold my hopper at all