
Barnes Suppressor Series Sierra MatchKing Rifle Ammunition .300 Blackout 220gr HP 1060 fps 20/ct
May 22, 2026
DBB BBL 556 16″ CARB MED 1/9 BLK
May 22, 2026SIG RM40016BTRDV2 M400 556 V2 16 30R BLK
$1,010.36
SIG RM40016BTRDV2 M400 556 V2 16 30R BLK
8 in stock
The M400 TREAD features a free-floating M-LOK enhanced handguard that is lightweight yet rigid for extreme control and ease of mounting accessories such as lights and handstops. The lower receiver has an ambidextrous safety for right or left-handed operation and includes an integrated QD mount for easy sling attachment. The M400 TREAD features a stainless steel barrel offering durability and corrosion resistance while improving accuracy; 3-prong flash hider; 1:8 twist rate; mid-length gas system; SIG Matchlite 2-stage trigger; MAGPUL SL-K telescoping stock for easy adjustment and a customized fit.
| UPC | 798681688005 |
|---|---|
| Manufacturer | Sig Sauer |
| Manufacturer Part Number | RM40016BTRDV2 |
| Action | Semi-Auto |
| Barrel Length | 16" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 30 + 1 |
| Rate of Twist | 1:8" |
| Safety | Ambidextrous |
| Shipping Weight | 8.6 |





