Guys, I've created an infographic to try and show the issues involved in using either a 0.136- or 0.125-inch bolt-face depth in 6.5 Grendel ARs.
If you assume the extractor is the same overall length and has the same extractor pin location as a standard 5.56 extractor, then a 0.125 bolt-face depth requires a weakened extractor lip, whereas a 0.136 depth allows either a standard 5.56 extractor lip or, for an enterprising company, an enhanced 6.5 Grendel extractor.
Feel free to repost these graphics all over the web whenever you're trying to explain 6.5 Grendel bolts.
If you assume the extractor is the same overall length and has the same extractor pin location as a standard 5.56 extractor, then a 0.125 bolt-face depth requires a weakened extractor lip, whereas a 0.136 depth allows either a standard 5.56 extractor lip or, for an enterprising company, an enhanced 6.5 Grendel extractor.
Feel free to repost these graphics all over the web whenever you're trying to explain 6.5 Grendel bolts.
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