The Element 65% Hop Up Bucking comes with the bucking, hop up spacer, barrel spacer and barrel bushing. The bucking and spacer are pretty self explanatory, the white plastic barrel spacer is made to keep the inner barrel steady in the hop up unit in front of the bucking. As for the barrel spacer, it's made to go near the front of your inner barrel to keep the front steady inside the outer barrel. It may not work on all applications, and is not completely necessary, but definitely a nice thing to have just in case.
Bought this off EBay, but same product.
This actually blue and comes with all the items in the picture.
The bucking has the 'Firefly' notch in the center
The nub is WAY too soft and barely puts any pressure to the bucking, which is made of cheap, way too thin rubber which doesn't fit in hop up units very nicely.
Most of the extra parts were useless for any purpose I could find
Rubber is very thin and doesn't affect hop up very well
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