Sig Sauer RM400-SDI-16B-P M400 X-Series, 5.56 NATO, 16 Barrel, Ambi Controls, Blk, (1) 30RD MAG

The M400 X-series features a free-floating M-LOK handguard, Magpul SL-K 6-position telescoping stock, Sig Flat Match Grade trigger, 16 Chrome Moly barrel, and a 7075 T-6 aluminum receiver with a black hardcoat anodized finish.