Add the SIG SAUER M400 SDI XSeries to your setup — practical, well-made, and ready for real use. Key specs: .223 Remington, 16" barrel, Black finish.

M400 SDI 5.56MM 16" BLK 30+1 — RM400-SDI-16B-P | MAGPUL STOCK

Order online from Dawson Defense — accessories ship straight to your door.