Outfitters Score™
Excellent
Sig Sauer, Inc. scores as a top-tier build with excellent value pricing and most components included.
Our proprietary rating combines brand tier, price percentile within the caliber, feature completeness, barrel versatility, retailer availability, caliber practicality, and use-case fit.
Description
SIG SAUER M400 COIL V2 TREAD 5.56 NATO SEMI-AUTO RIFLE W/ROMEO 5 GEN II The SIG Sauer M400 Coil V2 TREAD is a ready-to-run 5.56 NATO semi-automatic built for reliable, versatile performance. It pairs a 16a ^2 stainless steel barrel (1:8 twist) and mid-length direct-impingement gas system with a Tread enhanced M-LOK handguard, M-LOK vertical foregrip and barricade stop for secure, modular accessory mounting. The rifle ships optic-equipped with a Romeo5 Gen II red dot, SIG's crisp 2-stage Matchlite DUO trigger, ambidextrous safety and magazine release, and a six-position MAGPUL SL-K stock for easy length-of-pull adjustment-coming in at about 7 lbs loaded and 35 Mfg: Sig Sauer, Inc.
Features
M Lok|Ambidextrous|Ambi
Full Specifications
Overview
| Brand | Sig Sauer, Inc. |
| Model | RM400-16B-TRD-V2-COIL |
| SKU | 430114716 |
| Rifle Type | semi auto |
| Platform | AR15 |
| Caliber | 5.56 NATO |
| Chamber | 5.56 NATO |
| UPC | 798681726202 |
Barrel
| Barrel Finish | stainless |
| Twist Rate | 1:8 |
Receiver
| Forward Assist | No |
| Dust Cover | No |
Handguard
| Handguard Type | m-lok |
| Free Float | No |
Furniture
| Stock Type | collapsible |
| Stock Model | Magpul Sl |
Trigger
| Trigger Type | two-stage |
Muzzle
| Suppressor Ready | No |
Sights & Optics
| Sights Included | red-dot |
| Optic Ready | Yes |
Compliance
| CA Compliant | No |
| Classification | Rifle |
| NFA Item | No |
What's Included (Complete Rifle)
This is a complete, ready-to-shoot firearm.
Upper Receiver
Lower Receiver
Barrel
Bolt Carrier Group
Handguard
m-lok
Stock
Magpul Sl
Grip
Trigger
two-stage
Muzzle Device
Charging Handle
Gas Block
Gas Tube
Buffer Tube
Backup Iron Sights
Optic
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Swiss-origin firearms giant. The M400 and MCX platforms compete in the premium space, and Sig won the US Army NGSW rifle contract with the XM7.
View brand profile →M400 Coil V2 Tread 5.56 Nato Semi-Auto Rifle W/Romeo 5 Gen Ii - M400 Coil V2 Tread 5.56nato 16"bbl (1)30rd W/Romeo5 G2 Blk
RM400-16B-TRD-V2-COIL
Across 1 retailer
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