Just recently introduced at the 2011 NRA Show !
Sig Sauer's new M400 rifle on an AR platform. Similar to their wildly popular 556 rifles, including ambidextrous features, but with direct impingement operation instead of gas piston like the 556. With parts interchangeable o­n existing AR rifles, you can now buy the Sig brand and make full use of all your existing AR parts and maintenance knowledge. Some features of the new M400 include: Caliber 5.56 NATO­ Mag Capacity 30 rounds (aluminum AR-15 type)
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