G&G Hopup Bucking for Airsoft AEG w/ Cold-Resistant Material

"Great for high powered AEGs. This bucking stays consistent whether its 90 degrees or 5 below. I use two of them year round because they stay the most consistent, especially if snow gets in the hopup chamber. It is pretty accurate and can handle an m150 spring with appropriate bbs.

"Will give this a 5/5 because it is a good bucking, but it didnt come with a nub or spacer

"No nub or brass fitting but the bucking is pretty good.