Sorry ive been away on a hunting trip, ive just grabbed my M7's out of the safe and have some with the extra rail cut in the bolt and some without. Their appears to be no less slop (fully retracted bolt, moving bolt side to side) on the actions with the bolts with the extra guide rail slot in the bolt lug.....apart from the newest M7, the late model 223, which has a little less than any of the others. On the others that have more side to side slop when fully retracted, once the bolt is pushed forward a little much of that slop goes away.
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