"VLTOR Rear Profile"
What does this mean? Thinking about ordering a lower and this is listed as an option for $50. I can't find any explanation through google. It seems there is a VLTOR BCM charging handle. Does it necessitate this profile? I previous bought an upper with a BCM gunfighter charging handle and it was nice, but I don't think the lower had any sort of special profile. Maybe I was wrong.
I'm not that into ARs. This will be a blowback pistol cal carbine.
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