New design AK-74 block fits most polymer 5.45x39 mm magazines and will convert them to hold only 10 rounds. The new design features a spring catch which will allow an easy attachment point to the spring. This prevents the block making noise and epoxy can be added at this point to make it permanent. This block will replace the original magazine locking plate. Tested on the following magazines with perfect function: Tapco, Circle 21, Izmash (black), and East German Bakelite. Will likely work in other similar magazines. Feel free to try as you can always return them if they dont. Marked where to cut for a 15 round limiter or can be pre-cut if option below is selected.