Nightengale mags aren't completely compatible with the Brute Pro. They fit, but due to slight differences in geometry with the pack in 6 round mags they don't feed dead on in to the stock barrel.
Worker standard or heavy darts specifically quickly jam up the brute pro with nightengale mags, and you can feel the darts noticably catch while feeding.
They'll feed nitroshot+ due to the reduced diameter but will do a lot of damage to the outer ring portions of the darts in short order.
You may want to remove them from the quick listing for the Brute Pro as they only sort of work, if you don't might beating up your darts and being very picky with what you load.
