Black Guns Magazine P415 6.8mm Vuurwapen Blog Inside POF-USA P308 Gas Piston Weapon System GUNS and WEAPONS for Law Enforcement April 2008 POF-USA P416 HEAVY-FIRE ENDURANCE TEST Small Arms Review THE EVOLUTION OF THE MODERN BLACK RIFLE Small Arms Review Patriot Ordnance P415: The Ultimate AR? Gun Digest Aug '09 SPECIAL WEAPONS 2006 by Charlie Cutshaw POF-USA Shotgun News Ad M-4 and M-16: High Time to Make a Change Gun Digest Oct 2007 GUNS & WEAPONS FOR LAW ENFORCEMENT  JAN. 2007 P416 Weapon Systems Small Arms Review Sept 2006 Piston Powered ARs Shotgun News  July 2006 POF P415 Gun World May 2006

Guns & Ammo Combat Tactics Fall 2009           Frankly Speaking Meet Frank DeSomma, founder of POF page 69   Guns & Ammo Combat Tactics Fall 2009 The Guns of Patriot Ordnance page 56 Book of the AR-15 2010 Edition [P415 .223 Recon] The Complete AR Rifleman Black Guns Hunting 2010            Piston-Driven Powerhouse page 26