F Faxon 16" Pencil Profile AR15 Barrel, 556 Nato, Pinned Gas Block $198.55 15A58M16NPQ-APGB show more like this $8.99 Flat Rate Dirty Bird Industries F Faxon Firearms Ar-15 Pinned Gas Block 5.56x45 Nato Rifle Barrel - Ar-15 Pinned Gas Block 5.56x45 Nato 16" Pencil Nitride $216.20 15A58M16NPQ-APG show more like this additional Brownells F Faxon Firearms 16in Pencil Profile AR15 Barrel, 556 Nato, Pinned Gas Block, 15A58M16NPQ-APGB $216.20 15A58M16NPQAPGB show more like this Dvor F Faxon Duty Series Barrel AR-15 5.56x45mm 1 in 8 Twist 16" Pencil Contour Mid Length Gas Port with Pinned Gas Block Steel Nitride - 290292" $216.20 15A58M16NPQ-APGB show more like this 9.50 MidwayUSA