Currently in the process of sorting an SBR build and had some questions on the available 10.5" 5.56 barrels out. From what I've been able to find, .070 to .071" is the correct port size for this config.
Question is - is anyone making mil-spec chrome lined barrels (with an fsp) to this spec? Rifle will mainly if not exclusively be shooting 5.56 pressure ammo.
No luck on finding the Colt or LMT barrels anywhere and I've heard mixed results on DD and Noveske barrels (regarding port size). Any opinions on cutting a 6920 or BCM 16" socom barrel to 10.5 and opening up the port?
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