The factory acceptance accuracy of M 16A2 is 100 yards, and 10 rounds are scattered within 2 inches. The accuracy of M4 is lower than M 16, while the accuracy of HK4 16 is scar >: M4 >: Of course, HK4 16 >XM8 can keep up with the accuracy of snipers without comparing with SACR, but the accuracy of HK4 16 is still weaker than that of M4. In the dust test, the lowest failure rate is XM8, then SCAR, then HK4 16, and finally M4.