M400-SDI | X Series | 5.56 Nato | AR-15 | 16″ Rifle

The%20M400-SDI%20XSERIES%20has%20been%20developed%20with%20the%20input%20from%20the%20professional%20instructors%20at%20SIG%20SAUER%20Academy.%20Building%20upon%20their%20decades%20of%20experience%20and%20countless%20hours%20of%20instruction%2C%20we%20have%20developed%20the%20M400-SDI%20XSERIES%20to%20meet%20the%20highest%20standards%20of%20performance%20and%20reliability.%26nbsp%3B%20With%20fully%26nbsp%3Bambidextrous%20controls%26nbsp%3Bincluding%20a%26nbsp%3Bbolt%26nbsp%3Bcatch%2Fand%20release%20unique%20to%20the%20M400-SDI%20lower-receiver%2C%20the%20M400-SDI%20XSERIES%20delivers%20advanced%20performance%20for%20both%20left%20%26amp%3B%20right-handed%20shooters%20and%20makes%20transitional%20shooting%20easier%20than%20ever.%26nbsp%3B%20The%20free-floating%26nbsp%3Bhandguard%26nbsp%3Butilizes%20a%20new%20steel%20lockup%20design%20that%20significantly%20reduces%20handguard%20deflection%20by%20providing%20maximum%20rigidity%20and%20allows%20for%20accessories%20to%20be%20attached%20on%20all%20four%20sides%20with%20no%20effect%20on%20accuracy.%26nbsp%3B%20The%202-Stage%20Matchlite%20Duo%20trigger%20provides%20an%20out-of-the-box%20crisp%204.5%20-%206.5lb%20pull%20weight%20with%20a%20flat%20blade%20design%20for%20a%20precision%20feel.%20The%20M400-SDI%20XSERIES%20utilizes%20the%20highest%20quality%20performance%20coatings%20to%20ensure%20maximum%20durability%20and%20reliability.%0AM400-SDI%20XSERIES%20FEATURES%20INCLUDE%3A%0A%0AAmbidextrous%26nbsp%3BBolt%20Catch%26nbsp%3Band%20Release%0AHybrid%20Compensating%26nbsp%3BFlash%20Hider%0ADual%20Clamp%20Handguard%20Locking%20System%20for%20Reduced%20Deflection%0ALow%20Profile%20Gas%20Block%20with%20Mid-Length%20System%0ASIG%20Flatblade%20Match%20Trigger%0AMagpul%20SL%20Stock