SIG Sauer M400 CMB 16" MOE R4B 5.56 NATO Graphite AR-Pattern Rifle Romeo4B
Specifications
Action Double Action
Finish Graphite
Sights Red Dot Sights
Capacity 30
Grip Safety No
Optic Ready Yes
Barrel Length 16 inches
Manual Safety Yes
Trigger Safety No
Caliber / Gauge 5.56 NATO
Threaded Barrel Yes
WARNING: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to WWW.P65WARNINGS.CA.GOV
Description
Product Overview
The SIG Sauer M400 CMB AR-pattern rifle pairs a 16-inch nitride-treated barrel with a polymer MOE handguard and a Romeo4B closed red dot. It runs on a direct impingement system with a rotating locking bolt, making it a straightforward 5.56mm NATO platform built for consistent handling and quick target acquisition with a ready-to-use optic.
Key Features
- Direct impingement operating system with rotating locking bolt
- Nitride-treated 16-inch barrel for durable performance
- 7075 aircraft-grade forged lower with polymer MOE forend, grip, and collapsible stock
- Romeo4B closed compact red dot sight included with M1913 rail interface
- 2 MOA red dot with motion-sensor automatic on/off
- Manual brightness controls with 0.5 MOA adjustments and QD co-witness mount setup
If you want a compact, ready-to-shoot 5.56mm NATO AR with an optic included, the SIG Sauer M400 CMB and Romeo4B combo is a practical choice.
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- SKU:
- RM40016BECPR4B
- UPC:
- 798681553426
- BUDS ID:
- 719006219
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