Lego minifig compatible Custom BrickArms M16 is great for use with custom modern military minifigures. BrickArms puts the legendary “black rifle” in your minifigs’ hands with the BrickArms M16 Rifle! The M16 rifle is a family of military rifles adapted from the ArmaLite AR-15 rifle for the United States military. The original M16 rifle was a 5.56mm automatic rifle with a 20-round magazine. Combining power and accuracy, the BrickArms M16 is the perfect choice for minifig soldiers in the jungles of the Far East or the desert battlefields of today!