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Full Auto .458 SOCOM M16 Mag Dump!  [video] Full Auto .458 SOCOM M16 Mag Dump!  [video]
As a part our article series on the AR15 in the recent months we decided to join a Rock River Arms .458 SOCOM upper... Full Auto .458 SOCOM M16 Mag Dump!  [video]

As a part our article series on the AR15 in the recent months we decided to join a Rock River Arms .458 SOCOM upper on a friend’s registered fully automatic Colt M16 lower.  The result is 4,000 grains of Corbon lead flying downrange in 10 projectiles in 3 seconds.  Enjoy.

M16