SIG M400 ENHANCED for Sale
Browse SIG M400 Enhanced listings from verified sellers across the U.S. on GunsAmerica.
Quick Look
The SIG M400 Enhanced is a direct-impingement AR-15 platform introduced by SIG Sauer to offer improved performance and reliability in a civilian-legal rifle. Designed with premium components and careful attention to tolerances, it provides a high-performance edge right out of the box. The M400 Enhanced remains a popular mid-tier option for shooters seeking dependable performance with SIG engineering behind it.
Why It's a Top Choice
- Free-floating barrel enhances accuracy and consistency
- Premium SIG-made lower and upper receivers
- Comes optics-ready with flat-top rail
- Chrome-lined barrel with 1:7 twist handles various loads
- Minimal recoil with solid reliability under rapid fire
Key Variants
SIG M400 Tread
Entry-level variant with modular upgrades and affordable customization for newer AR owners.
SIG M400 Elite
Premium build with enhanced furniture and controls for serious tactical or duty use.
SIG M400 DH3
Competition-focused model co-developed with shooter Daniel Horner for 3-gun applications.
Competitor Comparison Table
| Feature | Sig M400 Enhanced | Daniel Defense DDM4 | BCM Recce 16 |
|---|---|---|---|
| MSRP | $1,099 | $1,799 | $1,400 |
| Capacity | 30+1 | 30+1 | 30+1 |
| Weight | 6.5 lbs | 6.6 lbs | 6.1 lbs |
| Optics-ready | Yes | Yes | Yes |
| Trigger type | Standard MIL-SPEC | Upgraded single-stage | Enhanced MIL-SPEC |
| Notable pro | Great value for premium parts | Superb barrel and build quality | Lightweight and battle-tested |
| Notable con | Trigger could be better | Higher price point | No ambi controls |
Best Use Cases
- Home defense
- Range training
- 3-gun competition
- Truck or ranch rifle
- AR collection or upgrade platform
FAQs
What is the barrel twist rate on the SIG M400 Enhanced?
The factory barrel twist is 1:7, ideal for stabilizing heavier 5.56 NATO rounds.
Can I run .223 Remington in the SIG M400 Enhanced?
Yes, its 5.56 NATO chamber safely handles both .223 Remington and 5.56 NATO loads.
How does the SIG M400 Enhanced compare to mil-spec ARs?
It offers better fit, finish, and features like a free-float handguard over most basic mil-spec models.
Prefer nearby results? Toggle to search local listings.
Sig Sauer M400 (RM400-16B-ROSE-R5X2) Ros
$1,429.99
Sig Sauer M400 Rose (RM400-16B-ROSE-R5-2
$1,499.99
Sig Sauer M400 Tread Predator 5.56 16"
$1,099.00
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