The M400 SDI X Series is the out of the box performance solution. The X Series features a 16″ chrome molly barrel with a free-floating M-LOK handguard, SIG Flatblade Match Trigger, ambidextrous bolt catch and release, Magpul SL stock, and mid-length gas system.
AR Rifles
SIG M400 XSERIES 556NATO 16″ 30RD
$1,499.99
SIG M400 XSERIES 556NATO 16″ 30RD
Availability: 4 in stock
| UPC | 798681664634 |
|---|---|
| Manufacturer | Sig Sauer |
| Manufacturer Part Number | RM400-SDI-16B-P |
| Action | Semi Auto |
| ATF Type | MODERN SPORTING RIFLE |
| Barrel Finish | Black FNC |
| Barrel Length | 16" |
| Caliber/Gauge | .223 REM/5.56 NATO |
| Capacity | 1-30RD |
| Length | 36.8'' |
| Magazine Included | 1 x 30-Round |
| Model | M400 |
| Number of Magazines | 1 30 rd. |
| Package Height | 4.3 |
| Package Width | 11.3 |
| Product Type | AR |
| Rate of Twist | 1:7" |
| Safety | AMBI SAFETY CONTROL |
| Shipping Weight | 10.0 |
| Sights | Optics Ready |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
| Thread Pattern | 1/2"-28 tpi |
| Units per Box | 1 |




