While the muzzle compensator worked well to reduce recoil and maintain control of the firing weapon, the dual-bullet design reduced accuracy at long ranges - requiring the operator to also carry basic 5.56x45mm NATO ammunition for any shots longer than medium range (about 325 meters).
In the end, none of the submissions were selected for further development as none could increase the M16A2's first-hit probability by 100%. After several hundreds of millions of dollars, the ACR program was killed. Attention then turned to the Objective Individual Combat Weapon in the 1990s but this too failed to find a successor to the storied M16 family of rifles - which remains in use today (2016).
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