SIG Sauer M400 B5 PSB Brace KeyMod Handguard 5.56 NATO Black Pistol
Capacity: 30+1 · Barrel Length: 11.5 inches
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Specifications
Grip Polymer
Action Semi-Automatic
Finish Black
Sights Standard Sights
Weight 6.5 pounds
Capacity 30+1
Grip Safety No
Optic Ready Yes
Barrel Length 11.5 inches
Manual Safety Yes
Overall Length 32.3 inches
Caliber / Gauge .223 Remington, 5.56 NATO
Threaded Barrel Yes
Magazines Included 1
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 B5 Pistol is an AR-pattern semi-automatic pistol chambered in .223 Remington and 5.56 NATO. It combines an 11.5-inch threaded barrel with a direct impingement gas system, an alloy frame, a KeyMod handguard, and Flat Dark Earth components. The PSB stabilizing brace supports controlled handling, while the F-marked front sight and flip-up rear sight provide a practical backup sighting setup. A full-length top rail allows the addition of a compatible optic.
Key Features
- Chambered for .223 Remington and 5.56 NATO
- 11.5-inch threaded barrel with a 1-in-7 twist rate
- Direct impingement gas system for familiar AR-pattern operation
- PSB pistol stabilizing brace and KeyMod handguard
- F-marked front sight with flip-up rear sight
- Alloy frame with Black finish and Flat Dark Earth components
The SIG Sauer M400 B5 Pistol delivers compact AR-style performance with a threaded barrel, stabilizing brace, and flexible sighting options.
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- SKU:
- PM400-11B-B5-FDE-PSB
- UPC:
- 798681523399
- BUDS ID:
- 96642
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Retail Availability
Bud's Gun Shop - Lexington, KY
1105 Industry Road, Lexington, KY 40505
Bud's Gun Shop - Sevierville, TN
2270 Two Rivers Blvd, Sevierville, TN 37876
Uncle Lee's - Greenville, KY
820 Main St, Greenville, KY 42345
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| Action | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic | Semi-Automatic |
| Barrel Length (in.) | 11.5 | 11.5 | 7.5 | 12.7 | 11.5 |
| Caliber / Gauge | 5.56 NATO, .223 Remington | 5.56 NATO | 5.56 NATO | 5.56 NATO | .223 Remington, 5.56 NATO |
| Capacity | 30 | 10 | 30 | 30 | 30 |
| Finish | Black | Black | Flat Dark Earth | Flat Dark Earth | Black Anodized |
| Manual Safety | Yes | Yes | Yes | Yes | Yes |
| Optic Ready | Yes | Yes | Yes | Yes | Yes |
| Sights | Standard Sights | Standard Sights | Standard Sights | Fiber Optic Sights | Standard Sights |
| Threaded Barrel | Yes | Yes | Yes | Yes | Yes |
| Overall Length (in.) | 32.3 | 28.5 | N/A | 29.5 | 28.5 |
| Weight (lbs) | 6.5 | 5.0 | N/A | 6.4 | 5.0 |
| Ambidextrous Safety | N/A | Yes | No | Yes | Yes |
| Actions | Current Item |
