I just set up an NFA trust and have stamps pending for a SiCo Omega and to SBR a lower. I currently have a 10.5" pistol build that will be my upper for the SBR but the problem is my rail is 12" and so I need a new one so the Omega can fit. I will want to build a 300 BLK upper because why not and so I am wondering if I got a 12.5" barrel if I would regret it or not. Reason being I have the 12" rail and would just reuse it.
From what I've read it doesn't seem like I would benefit much from the longer barrel in 300BLK and a 9" barrel would be fine. Anyone have a 12.5" barrel and wish they had gone shorter? Any advice in general?
Expected use other than quiet paper punching is maybe some deer or similar sized hunting at 50-200 yards.
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