Faxon Firearms .223 Wylde Pencil AR -15 Rifle Barrel Mid-Length 416-R Stainless QPQ Nitride 5R NP3 Extension Black Nitride 16 15BW8M16NPQ-5R-NP3. 223 Wylde Pencil Rifle Barrel. These AR15 Barrels created by Faxon Firearms are made with 5R hybrid...