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I just received my 6.8SPC conversion kit yesterday and am pretty excited about testing it out this weekend. I was wondering if there are any markings on the bolt that indicate that it is the 6.8SPC bolt. I couldn't find any. Of course, I can compare the 6.8 bolt to the 5.56 bolt, or check to see which ammo fits which bolt, but I was wondering if there were any markings or distinguishing features.

Thanks.
 

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The bolt face is noticeably larger - some mark with a silver sharpie, but you should be able to tell just by looking at it.
 
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