RM400-300B-16B-ECP Showing the single result Default sorting Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sale! IN STOCKSIG M400 AR-15 .300 Blackout 16 Barrel 30rd Mag $1,212.29 Original price was: $1,212.29.$1,091.06Current price is: $1,091.06. Add to cart