By David Crane defrev (at) gmail (dot) com July 27, 2011 DefenseReview first became aware of the TNW SGP-QCB (System Gas Piston-Quick Change Barrel) 5.56x45mm NATO (5.56mm NATO)/.223 Rem. gas piston/op-rod tactical AR carbine/SBR (Short Barreled Rifle) weapons/upper receiver assemblies in December 2009 in a NorthwestFirearms.com forum thread. We subsequently did some additional research on the system in early June …

By David Crane defrev (at) gmail (dot) com All photos and video clips contained in this article were shot by either by DefenseReview.com (DR) or Nick Leghorn, writer/photographer for The Truth About Guns (TTAG), and are copyrighted. DefenseReview.com owns the copyright on these materials. All photos and video clips below were shot with either a Canon PowerShot S90 10-megapixel digital …

By David Crane defrev (at) gmail (dot) com All photos contained in this article were shot by DefenseReview.com (DR), and are copyrighted. DefenseReview.com owns the copyright on these materials. The photos were shot with a Canon PowerShot S90 10-megapixel digital camera (still camera with video capability). All video clips contained in this article belong to DefenseReview.com (DR), and were shot …

By David Crane defrev (at) gmail (dot) com All photos contained in this article were shot by DefenseReview.com (DR), and are copyrighted. DefenseReview.com owns the copyright on these materials. The photos were shot with a Canon PowerShot S90 10-megapixel digital camera (still camera with video capability). All video clips contained in this article belong to DefenseReview.com (DR), and were shot …

By David Crane defrev (at) gmail (dot) com April 21, 2011 Updated on 4/21/11. A company called Adcor Defense is manufacturing and marketing a new gas piston/op-rod (operating rod) tactical AR (AR-15) rifle/carbine/SBR (Short Barreled Rifle) called the B.E.A.R. Gas Piston Rifle (GPR). “B.E.A.R.” is an acronym that stands for “Brown Enhanced Automatic Rifle”, since the weapon was designed and …

By David Crane defrev (at) gmail (dot) com April 1, 2011 Last updated on 4/07/11. Late last year, David Howlett, founder of USTACRA (United States Tactical Rifle Association) and close friend of DefenseReview’s (DR), alerted us to STS Arms, a boutique gun builder/smith and weapons coating (gun coating) outfit specializing in advanced internal and external ceramic coatings (tactical firearm coatings). …

By David Crane defrev (at) gmail (dot) com All photos and video clips contained in this article were shot by DefenseReview.com (DR), and are copyrighted. DefenseReview.com owns the copyright on these materials. The photos and some video clips were shot with a Canon PowerShot S90 10-megapixel digital camera (still camera with video capability). Some video clips were shot with a …

By David Crane defrev (at) gmail (dot) com All photographic images contained in this article were taken by DefenseReview.com, and are the exclusive property of DefenseReview.com. DefenseReview.com owns the copyright on these photos. All photos were shot with an Olympus Stylus 790 SW 7.1-megapixel digital camera, which is advertised as “shock + waterproof”. September 16, 2010 The video clips below …

By David Crane defrev (at) gmail (dot) com All photos contained in this article were taken by DefenseReview.com, and are copyrighted. DefenseReview.com owns the copyright on these photos. The photos were shot with Canon PowerShot S90 10-megapixel digital camera (still camera with video capability). August 19, 2010 Last updated on 1/08/11. While DefenseReview (DR) was at SOFIC 2010, we got …

By David Crane defrev at gmail dot com All photographic images contained in this article were taken by DefenseReview.com, and are the exclusive property of DefenseReview.com. DefenseReview.com owns the copyright on these photos. All photos were shot with an Olympus Stylus 790 SW 7.1-megapixel digital camera, which is advertised as "shock + waterproof". March 19, 2009 John Paul, owner of …