Subguns.com NFA Firearms Discussion Board
Sig 553 lower SBR question
Posted By: Brian
Date: 7/7/20 02:42
I have been considering doing a form 1 on my Sig 553 to a SBR configuration. Question though instead of doing the upper which is the serial numbered part would it be possible to take a lower group, engrave my name and SN as the SBR instead? That way if I would not be marking up my 553 upper receiver and if I wanted to take it back to a pistol it would be easy by swapping out the lower.
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