less accurate than the forged/milled receivers of their predecessors: the milled AK-47s are capable of shooting groups at , whereas the stamped AKMs are capable of shooting groups at . The best shooters are able to hit a man-sized target at within five shots (firing from prone or bench rest position) or ten shots (standing). The single-shot hit-probability on the NATO E-type Silhouette Target (a human upper body half and head silhouette) of the AK-47 and the later developed AK-74, M16A1 and M16A2 rifles were measured by the US military under ideal proving ground conditions in the 1980s as follows: Under worst field exercise circumstances, the hit probabilities for all the tested rifles were drastically reduced, 34% at 50m down to 3–4% at 600m with no significant differences between weapons at each range. Russian method The following table represents the Russian method for determining accuracy, which is far more complex than Western methods. In the West, one fires a group of shots into the target and then simply measures the overall diameter of the group. The Russians, on the other hand, fire a group of shots into the target. They then draw two circles on the target, one for the maximum vertical dispersion of hits and one for the maximum horizontal dispersion of hits. They then disregard the hits on the outer part of the target and only count half of the hits (50% or R50) on the inner part of the circles. This dramatically reduces the overall diameter of the groups. They then use both the vertical and horizontal measurements of the reduced groups to measure accuracy. This circular error probable method used by the Russians and other European militaries cannot be converted and is not comparable to US military methods for determining rifle accuracy. When the R50 results are doubled the hit probability increases to 93.7%. R50 means the closest 50 percent of the shot group will all be within a circle of the mentioned diameter. The vertical and horizontal mean (R50) deviations with service ammunition at for AK platforms are. Users : Type 56 variant. : EKAM: The counter-terrorist unit of the Hellenic Police. : Type 58 variant. – Locally made as well as being in service with the Army : Replaced by the AKM in 1959 and the AK-74 in 1974. Used by Thahan Phran Former users : MPi-K (AK-47) and MPi-KM (AKM). : Replaced by