Thread: What chamber reamer was used?
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Old 01-01-2017, 06:32 PM
CoffeedrinerinNC CoffeedrinerinNC is offline
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Default What chamber reamer was used?
I have an M&P 15 that has the barrel market 300 Whisper/300 ACC Blackout.

Did S&W use the 300 Blackout reamer, the 300 whisper rearmer, or a custom reamer.
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