By David Crane defrev (at) gmail (dot) com July 9, 2010 For quite some time, now, DefenseReview (DR) has been publishing information on just how reliable the direct-gas-impingement (DGI) select-fire Colt M4/M4A1 Carbine/SBR (Short Barreled Rifle) and semi-auto AR-15 carbine/SBR can be if they’re properly set up/sprung and lubricated (and even if they’re not properly lubricated). We have retired U.S. …

By David Crane david (at) defensereview (dot) com July 10, 2016 Last until dated on 7/10/16. As long as we’re discussing the latest and greatest SureFire products, we should probably mention the new SureFire Optimized Bolt Carrier-Long Stroke (OBC-LS) (temporary name) drop-in BCG (Bolt Carrier Group and H7S Buffer System with longer action spring. Designed for SureFire by legendary infantry …

By David Crane defrev (at) gmail (dot) com All photos contained in this article were taken by DefenseReview.com (DR), and are copyrighted. DefenseReview.com owns the copyright on these photos. The photos were shot with a Canon PowerShot S90 10-megapixel digital camera (still camera with video capability). The following article is property of DefenseReview.com (DR) and is copyrighted material. If you …

By David Crane defrev (at) gmail (dot) com December 3, 2010 Last updated on 9/25/13. Since DefenseReview (DR) has been covering polymer AR magazines in our previous two stories, it's only fair that we publish one on some very cool enhanced-capacity metal mags (aluminum mags)–and this one's a biggie, folks. O.k., he're we go: SureFire is getting into the tactical …

By Michael Pannone This article is the follow-up to the author’s first article on the subject, titled "M4/M4A1 Carbine Reliability Issues: Why They Occur, and Why They’re Our Fault!". March 15, 2009 If your Explorer gets a flat does that mean "Fords are unreliable"? If you put bad fuel in your Tundra does that mean "Toyotas run crappy"? Stay with …

By David Crane defrev at gmail dot com December 29, 2008 If you’re looking for an alternative to standard USGI 30-round AR-15/M16 magazines, but you’d prefer to stick with metal mags instead of going polymer with the MagPul PMAG, TangoDown ARC mag, or Lancer Systems L5 Translucent Polymer Mag for your tactical AR-15 carbine, Fusil-USA, LLC has just the thing …

Why M4's have reliability issues…and why it's our fault! By Michael Pannone December 24, 2008 I fired 15,000 rounds through a semi-automatic M4/M4A1-type direct-gas-impingement (DGI) carbine in 31 weeks without a single malfunction attributable to anything except bad ammunition or bad magazines, with a grand total of 9 malfunctions. The least number of rounds fired between cleanings was 960 rounds, …

by David Crane defrev at gmail dot com All photographic images contained in this article were taken by DefenseReview.com at SHOT Show 2008, and they are the exclusive property of DefenseReview.com. DefenseReview.com owns the copyright on these photos. All photos were shot with a 7.2-megapixel Sony Cyber-shot digital camera (Model #: DSC-P150). March 13, 2008 Updated on 3/14/08 DefenseReview came …

by David Crane defrev at gmail dot com Speaking of AR rifle mags, Cammenga Corp. is making a very cool 30-round AR-15/M16 magazine (4179 STANAG box mag) called the EasyMag that that is truly unique, very interesting, and really cool. Billed as a "Next-Generation Firearm Magazine", the Cammenga EasyMag Model EM3-556 features an "open-case" design that allows for very fast …

By Charlie Cutshaw For those of you who may have been on another planet for the past three or four years, our troops in Iraq and Afghanistan are having serious reliability issues with the M16 rifle and M4 Carbine, especially the latter. The basic problems with the M16 and M4 are nothing new. M16 reliability issues date to the mid-1960s …