I have a pre 2013 AR15 it was a 16” with a Magpul hanguard, Magpul ACS stock. I upgraded only s BHW 18” bull barrel and a free float 15” had guard sometime in 2017. The barrel is not marked HBAR. Can I legally sale this rifle in the state of MD. If not can I engrave HBAR on barrel as this what it is. Yes for a 18” rifle it is heavy.
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