||This is definitely a smart upgrade to a high-end AEG.
The machining, equality, and overall build is fantastic. It is slightly larger than most hop-up spacer corridors, meaning this is somewhat frustrating to install since the spacer is a little bigger than the slot it need's to fill into. But once you get it in, its not going to slip or lose position, so get past the installation and you're good to go.
Also, THIS WILL ONLY WORK WITH FLEXIBLE BUCKINGS.
If your hop-up bucking is rather solid and tough, the shaping won't take affect. If the bucking is flexible, it should work fine like it did in my gun and you should get improvements in accuracy.
pain to install
only works with flexible buckings
Rating: [4 of 5 Stars!]