Complete Hopup Set for A&K / G&P ACR Masada Series Airsoft AEG Rifles

"Does exactly what it says it does. Fits perfectly. Good product. Be careful not to lose the tiny bar when you open it though! I recommend making sure you know all the pieces needed for a hop up unit before attempting to install.

"Got this in the mail today and it is exactly what it says. It is a stock hop up unit to replace damaged ones (I broke my old one when I took out the inner barrel). Works just like the one that the gun came with. Word of caution though, it comes in pieces that must be assembled but that is a trivial matter if you have even half a brain. Good product overall.