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By the way, the consensus on 300 Blackout ARs is that any barrel length longer than 9 inches for .300 Blackout does not really gain anything, but you lose a considerable amount of muzzle velocity at any barrel length shorter than 9 inches for .300 Blackout, just so you know.
According to 300aacblackout.com, at 300 meters, 300 BLK has 16.7% more energy than 7.62x39mm. Max effective range, using M4 military standards for hit probability, is 440 meters for a 9 inch barrel, and 460 meters for a 16 inch barrel. 300 BLK from a 9 inch barrel has the same energy at the muzzle as a 14.5 inch barrel M4, and about 5% more energy at 440 meters - even though the barrel is much shorter. |
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