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5.45x39 vs 5.56 nato
5.45x39 vs 5.56 nato













5.45x39 vs 5.56 nato

That is assuming the bolt would hold onto the rimless base of the 5.56mm round and the firing pin would still align with the primer. The overall length of each round is not so different (+1.4mm for 5.56) so the tip would just protrude a little bit more into the bore which is meaningless. Depending on the tolerances of the AKM breech this could mean its possible for a 5.56mm round to be fully seated with the breech closed. The shoulder of the 5.56mm case is just 0.4mm wider than the neck of the 7.62x39. While there is no way an AK would feed 5.56mm from a magazine it is kind of possible you could seat the round in the breech. This would certianly be something interesting to try if you had a safe range and spare AKM you wouldn't mind destroying.















5.45x39 vs 5.56 nato