Hybrid MSD - smaller, better asa retention system (ball bearings instead of screws).
Psycho Ballistics bullet - bigger, on/off dial is hard to turn.
ASP qev kit
CP Micro drop
CP Twist Lock
Halo B w/ Rip Drive
Brings tank forward without bringing it down.
See review body.*
Not a fan of full drops but not a fan of rails or direct mounts (unimounts, duckbills, etc), either. I had the Hybrid MSD, which is a tiny drop that functions like a rail but with more style.
I've got a 68/45k tank so with the Hybrid MSD it felt too long when holding my entire setup (maybe my arms are too short). So i wanted something that would bring the tank forward about an inch more but not drop the tank down anymore than the MSD.
CP's micro drop does that perfectly. I compared it to the MSD and it's exactly the same height so the tank doesn't drop down. Makes my marker look very compact.
*However, after installing it i could not screw on my tank. The guage & fill nipple are in the way. Uh oh. I removed the asa from the drop and screwed it on the tank, then installed the tank/asa together. Now that works. Nipple & guage are on the right side, out of the way. So the price for a comfortable & compact setup is having to remove the asa to get the tank off. Good thing the asa has an on/off button.
Very nice drop. But be wary of installation - y'all will have to do exactly what i did to get the tank on there. And if you've got a co2 tank, forget it.
Gave it a 7 overall but once it's on there it deserves a 9.