Sorry didn’t know i had a reply. No marks on the bolt carrier. The upper receiver has that letter C. on the rear block where the take down pin goes. No other markings. The barrel is a 1 to 7 twist modified government profile.
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These are the blems currently for sale on BCM’s website for $89.95. They are stripped but include the forward assist and dust cover. The machining appears to be perfect. Save yourself $10 plus tax and shipping. I have two for $80 a piece.
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I have a new carbine upper. It had a 16” carbine gas barrel with F marked front sight post, Magpul handguard, nitride bolt carrier group with Carpenter
158 bolt and standard charging handle. The receiver and delta ring have a deep black anodizing similar to what BCM does on their full rifles. I...