This piece drops in easily to a ZPAP and is much more ergonomic to use than the factory safety. There is a reason why many modernized AKs that are fielded by militaries like the Beryl and AK12 have safeties similar to this; Its just too good and too simple of an upgrade to not have. The only complaint I have is that while flicking it off of safety is comfortable, flicking it back on is a little uncomfortable due to the sharp edges. This could just be an issue with the shape and size of my hand. Regardless, A couple layers of goon tape at the bottom fixed that.