Anyone here issued 300BLK?
Ran into a sheriff deputy at the range today. He had an issued 8" 300BLK upper on a Colt MG lower (not sure if it was an M16 or M4). It was equipped with a Trijicon MRO and Geissele MLOK rail. He didn't seem too keen on chatting, so I didn't ask many questions.
I was surprised to say the least.
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