Don't forget to buy super glue! - Franklin Armory BFSIII AK-C1 Trigger - Binary Firing System for AK Platforms

Yes, superglue is an important part of the installation process. There are three plastic top hat plugs that have to be superglued in order to keep them in place. Otherwise, you'll have three open holes in the body of the weapon. Skipping this step, or failing to make sure the superglue holds them in properly, is a huge mistake. Once you've installed the trigger, removing it requires re-installation of the slave pin, and even more work if you don't get that done correctly. It's just easier to make sure the plugs are glued in place at the beginning. If it weren't for the superglue, I'd give this 5 stars. Also, as another reviewer mentioned, this works great with a PSA AK-P MOE SBA3 Pistol. Just note, there is a small extra piece that came with my PSA-AK, where the pistol grip attaches to the body, you might think you need to re-install that small-angled adapter piece under the trigger, but you don't need to since the bolt for the pistol grip attaches to the trigger. If you leave that small angled piece in there, you'll end up having to un-install the trigger just to remove it. Again, just an FYI.