SIG Sauer SIGM400 Optic Combo 5.56 NATO Graphite Rifle w/ ROMEO4B
Caliber: 5.56 NATO · Capacity: 30
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Specifications
Action Semi-Automatic
Finish Graphite
Sights Red Dot Sights
Weight 7.5 pounds
Capacity 30
Grip Safety No
Optic Ready Yes
Barrel Length 16 inches
Manual Safety Yes
Overall Length 32.5 inches
Trigger Safety No
Caliber / Gauge 5.56 NATO
Threaded Barrel Yes
Magazines Included 1
Ambidextrous Safety No
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 SIGM400 Optic Combo is a semi-automatic 5.56 NATO rifle configured for versatile range, training, and defensive use. Its 16-inch Nitride-treated barrel pairs with a direct-impingement operating system and rotating locking bolt for dependable cycling and consistent handling. The forged 7075-T6 aluminum lower receiver is fitted with Magpul MOE furniture, including a collapsible stock, forend, and grip. A factory-installed SIG Sauer ROMEO4B red dot sight provides a crisp 2 MOA aiming point, motion-activated illumination, adjustable brightness, and flexible co-witness mounting through the included low and high mounts. The rifle accepts standard AR-pattern magazines and includes one 30-round magazine.
Key Features
- 16-inch Nitride-treated barrel balances maneuverability with practical rifle velocity
- Chambered in 5.56 NATO for broad ammunition and magazine compatibility
- Direct-impingement system with rotating locking bolt supports reliable semi-automatic operation
- Forged 7075-T6 aluminum lower receiver provides a durable, lightweight foundation
- Magpul MOE collapsible stock, forend, and grip allow adaptable handling and fit
- Factory-installed ROMEO4B red dot sight offers a 2 MOA reticle and motion-activated illumination system
The SIGM400 Optic Combo combines a proven AR-pattern rifle platform with Magpul furniture and a ready-to-use ROMEO4B red dot sight.
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- SKU:
- RM40016BECPR4B
- UPC:
- 798681553426
- BUDS ID:
- 719006219
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Barrel Length (in.) | 16.0 | 16.0 | 16.0 | 16.0 | 16.0 |
| Caliber / Gauge | 5.56 NATO | .223 Remington, 5.56 NATO | .223 Remington, 5.56 NATO | .223 Remington, 5.56 NATO | .223 Remington, 5.56 NATO |
| Capacity | 30 | 30 | 30 | 30 | 30 |
| Finish | Graphite | Brown Cerakote | Blue/Black | Bronze | Olive Drab Green |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | Yes | Yes | Yes |
| Overall Length (in.) | 32.5 | 36.25 | 32.5 | 34.0 | 32.0 |
| Threaded Barrel | Yes | Yes | Yes | Yes | Yes |
| Weight (lbs) | 7.5 | 6.6 | 6.5 | 6.95 | 6.6 |
| Sights | Red Dot Sights | N/A | N/A | N/A | N/A |
| Actions | Current Item |
