Yes they are compatible.
The flat bottom is good if you want to mount an asa or a stock that already has an angle on it like a Carter stock. With the asa it will allow the tank to be horizontal and not at an upward angle.
Originally Posted by Talfuchre
I will lock this damned thread up if anyone posts that disgusting picture I saw once.
It like the CCM version of Two Girls One Cup.
I will ban folks.... I swear.