Available for In-Store Pick Up One new in box Sig Sauer M400 SDI VTAC chambered in 5.56mm NATO. This rifle has a 16 inch barrel with a 1 in 7 inch twist, two stage match trigger, M-Lok free float handguard, Magpul MOE SL telescoping stock, ambidextrous controls, brown cerakote finish and comes with one 30 round magazine, a Viking Tactics sling, the factory cardboard box and the factory paperwork.