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Will Future U.S. Military Submarines Be Invisible to Enemy Sonar Detection?: Enter Acoustic Metamaterial Cloaking Tech

By David Crane defrev (at) gmail (dot) com June 16, 2009 It looks like the whole metamaterial/negative-index material movement just got another shot in the arm with the development of an "acoustic metamaterial lens" that can theoretically create an acoustic/sonic "invisibility cloak" a.k.a. "cloak of silence" capable of hiding military submarines from enemy detection. DefenseReview first reported on metamaterials a.k.a. negative-index ... Read More »

Smith & Wesson M&P15R 5.45x39mm Tactical AR-15 Carbine: Have your AR-15 with a side of Russian.

by David Crane May 6, 2009 The April 2009 issue of Special Weapons for Military & Police (SWMP) (Gun Buyer’s Annual #74) has an article on the Smith & Wesson (S&W) M&P15R 5.45x39mm Russian (a.k.a. 5.45x39mm Soviet a.k.a. 5.45x39mm Kalashnikov) semi-auto tactical AR-15 carbine. It’s an interesting offering, since the 5.45mm Russian is an interesting little cartridge, and combining it ... Read More »