
Originally Posted by
patrick sweeney
The angle in question is the lead-in surface to allow the bolt to cam into the locking lugs of the barrel extension. The little angle cut you see is a manufacturing artifact that happens, probably because the mil specs don't address just how big or small that cut can/is allowed to be.
You can be snarky and say it is sloppy set-up by the CNC operator or path cutter programmer, but if it doesn't decrease strength, and isn't addressed by the mil specs, no-one involved cares one whit for your snark.
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