AR15 or Desert Tech MDR which defeated body armor? | Desert Tech

How much velocity do you really lose with a 10.3" barrel SBR like the MK18? Secondly do you give up lethality for mobility with reduced velocity of an SBR? Which rifle successfully penetrated Level III+ body armor with the army's new M855A1 armor piercing round? Check out this high speed video of the results!

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