Depends on the hop up rubber. Type B for split buckings like the PDi W hold and Type A for standard types like the stock one and Laylax purple one.
Airsoft Forums UK
Unrustle_Thine_Jimmies
M_P
Type b its better for heavier weights that'd be what I'd go for
Airsoft_Mr B
Haven't looked at upgrading the hop rubber yet but I know that would be a good upgrade, I heard the recommended BB weight for the BAR-10 was .3s but I haven't used it before so I don't have any idea how it performs with different weights and power
