5 in total that all work 100% with no leaks. These will fit WE tech AKs in addition to Well AKs (I have a WE AK to show it). Cant speak for a GHK. They arent all that efficient in a WE tech just as a heads up. 1 cartridge gets you through 1 mag (aprox 30 rounds). Has the feature to turn off dry firing for realism as well. Can part them for $25 shipped a piece or all for $100 shipped. They go for around $22ish new BUT they only seem to be available overseas. These things are heavy as well, feel like loaded real steel mags. No tr@des pls.