This.300 blackout chambered 10.3 inch performance series barrel is machined from crmov steel with a qpq corrosion resistant finish.Ba's performance series barrels feature a nickel boron coated m4 feed ramp extension and are hp and mpi tested hanson series barrels feature ba's proprietary ba hanson profile and include a pinned lo-pro gas block.Hanson barrels are not designed to work with aftermarket piston kits.
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