BUY Sig Sauer M400 556 Nato Tread AR Pistol PM400-11B-TRD.The M400 TREAD pistol is an optics ready, aluminum receiver rifle caliber pistol. The “Tread” pistol features an 11.5″ Nitride Coated barrel with a free-floating M-LOK handguard. This model also features a single-stage polished/hard-coat trigger, ambidextrous controls, and a Shockwave KAK Blade adjustable pistol brace. This model is chambered in .223/5.56 and ships with (1) 30rd Magpul Pmag.
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