Sig Sauer SIGM400 SDI X Rifle 5.56mm 30rd Magazine(1) 16′ Threaded Barrel M-LOK Handguard Moss Green Finish
Sig Sauer SIGM400 SDI X Rifle 5.56mm 30rd Magazine(1) 16′ Threaded Barrel M-LOK Handguard Moss Green Finish
$1,599.99
5 in stock
Features:
- CALIBER: 5.56 NATO
- SIGHTS: Optics Ready
- BARRELLENGTH: 16 in [406.4 mm]
- BARREL MATERIAL: Chrome / Moly Steel
- TWIST RATE: 1:07
- THREADS: 1/2 in – 28 tpi tapered shoulder
- MUZZLE DEVICE: SIG Flash Hider-Compensator
- ACTION TYPE: Semi-Auto
- OPERATING SYSTEM: Mid-Length Direct Impingement
- STOCKTYPE: 6-Position Magpul MOE-SL Black
- GRIPTYPE: Reduced Angle
- TRIGGER TYPE: SIG 2-Stage Matchlite Duo
- TRIGGER SHAPE: Flat
- MANUAL SAFETY: Ambidextrous
- FORENDTYPE: M-LOK Moss Green Cerakote
- ACCESSORY RAIL: M-LOK/Picatinny
- MAG TYPE: AR-15
- MAGS INCLUDED: (1) 30rd Polymer Mag
- COLOR: Moss Green Cerakote
- RECEIVER FINISH: Moss Green Cerakote TM
- OVERALL LENGTH: 36.5 in
- COLLAPSED LENGTH: 33.25 in
- FOLDED LENGTH: N/A
- OVERALL WIDTH: 2.8 in
- HEIGHT: 7.1 in
- WEIGHT: 7 lbs
- FORWARD ASSIST: Yes
Additional information
| Upc | 798681701216 |
|---|---|
| Manufacturer | Sig Sauer |
| Manufacturer part number | RM400-SDI-16B-MSGRN |
| Action | Semi-Auto |
| Atf type | Rifle |
| Barrel length | 16" |
| Capacity | 30 + 1 |
| Length | 33.25'' |
| Magazine included | 1 x 30-Round |
| Model | M400 |
| Number of magazines | 1 30 rd. Polymer Mag |
| Package height | 4.0 |
| Package width | 11.3 |
| Product type | Rifle |
| Rate of twist | 1-in-7" |
| Safety | Lever Action |
| Shipping weight | 9.65 |
| Sights | No |
FAQ
What is BJ Firearms LLC?
BJ Firearms LLC is a federally licensed firearms business focused on providing quality firearms, accessories, and related services while promoting responsible ownership, education, and community engagement.
When was the company founded?
The company was founded to serve firearm enthusiasts with knowledgeable service, real-world experience, and a commitment to professionalism and safety.
What makes your company different from other firearm retailers?
We focus on real experience, personalized service, hands-on product knowledge, and community involvement — not just sales. Our goal is to help customers make informed decisions and feel confident with their equipment.
Are you a licensed firearms dealer?
Yes. We operate as a federally licensed firearms dealer (FFL), following all applicable federal, state, and local regulations.
Do you work with major distributors and manufacturers?
Yes. We partner with trusted suppliers to provide quality products and reliable sourcing.
Do you collaborate with creators or industry professionals?
Yes. We partner with content creators and industry professionals to provide real-world insights and experiences.
Do you serve beginners or only experienced firearm owners?
We work with everyone — from first-time buyers to experienced enthusiasts. Education and guidance are a big part of what we do.
What products do you offer?
We offer firearms, accessories, gear, and related equipment depending on availability and customer needs.
Do you help customers choose the right firearm or gear?
Yes. We help customers evaluate their needs, experience level, and intended use to find the right fit.
Do you offer custom builds or special orders?
Yes. Depending on the request, we can help source specific products or assist with custom configurations.
Do you participate in events or demonstrations?
Yes. We actively engage in hands-on experiences, demonstrations, and community-related firearm activities when possible.
Do you create educational or informational content?
Yes. We support content that helps people learn about equipment, safety, and responsible firearm ownership.
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