NATO Dummy Rounds are available from the Strike Polymer Ammo Collection by Strike Industries... "This is the Strike Industries Polymer Ammo Collection (NATO Version). In a single array, it includes one of each (5) listed calibers which can be removed from the plastic container.

Well, we don't know how you are going to use these Magpul 5.56x45 Dummy Rounds, maybe for some effect for your loadout, or just plain collection. MoaiHobby are offering to give these free for every airsoft gun that you buy from them... "FREE!!! Any purchase of rifle can get free Magpul PTS Dummy Rounds – 5.56x45, 5 Pack."