Description
The Sig M400 Tread Used .223/5.56, 16″ Barrel, Vortex Spitfire, Extra Stock, Black, 30rd is a pre-owned, optics-ready AR-15 platform rifle from SIG Sauer. It’s a complete, value-packed package featuring a proven 16-inch barrel, a Vortex Spitfire prism sight, an extra stock, and a 30-round magazine, all for a price significantly below building a similar setup new. This ready-to-shoot package ships to Missouri and compliant US states.
Key Features
- Complete Optics-Ready Package: Comes with a Vortex Spitfire prism sight pre-installed—no need to buy a separate optic right away.
- Sig M400 Tread Foundation: Built on SIG’s reliable, mil-spec compatible AR platform known for durability and straightforward operation.
- Extra Stock Included: Provides flexibility for fit and comfort, allowing you to tailor length of pull without an extra purchase.
- 16″ Barrel Chambered in 5.56 NATO: Offers optimal velocity and versatility, safely firing both .223 Remington and 5.56x45mm NATO rounds.
- Significant Cost Savings: Priced at $883.59, this used package delivers a sight-equipped rifle for often less than the cost of a new, bare Tread.
Specifications & Details
| Specification | Detail |
|---|---|
| Caliber | .223 Remington / 5.56x45mm NATO |
| Barrel Length | 16 inches |
| Overall Length (Approx.) | 32-35 inches (stock dependent) |
| Weight (Unloaded, Approx.) | ~6.7 lbs |
| Magazine Capacity | 30 Rounds |
| Sights | Vortex Spitfire Prism Optic (Included) |
Who This Rifle Is For
This is a prime pick for the budget-conscious shooter who wants a no-fuss, ready-to-roll AR-15 without the premium of a new-in-box model. It’s ideal for a first-time AR owner, a practical home defender, or a recreational shooter who understands that a used firearm from a reputable brand like SIG represents serious value. You get a capable rifle and a quality optic in one transaction, avoiding the piecemeal cost of building a similar setup. The package is essentially drop-in ready, requiring only an FFL transfer for firearm purchases to get you to the range.
Practical Pros & Cons
Pros: The biggest advantage is the out-the-door cost. A new Sig M400 Tread often starts around this price without an optic. Adding a Vortex Spitfire is another $250-$300. Here, you get both. The included extra stock is a nice bonus for fit adjustment. The 16-inch barrel is the most versatile legal length, and the rifle’s mil-spec DNA means vast aftermarket support for parts like handguards or triggers from brands like Magpul or Geissele.
Cons: It’s a used firearm, so it may show minor cosmetic wear—a fair trade for the savings. The Vortex Spitfire is a great optic, but it’s a fixed-magnification prism; if you had your heart set on a variable-power scope or a red dot, you might still incur a swap cost. The rifle’s total weight, around 6.7 pounds unloaded, is standard but something to note for all-day carry.
Frequently Asked Questions
Frequently Asked Questions
Q: What’s the condition of this used rifle?
A: As a general firearms product from our inventory, it is mechanically sound and ready to fire. It may exhibit typical cosmetic wear from previous handling and use—think minor finish marks—which is precisely how we can offer such a compelling value on a SIG Sauer package.
Q: Is the Vortex Spitfire a good optic for this rifle?
A: Absolutely. The Spitfire is a perfect match for a value-oriented build. It’s durable, holds zero, and its etched reticle means you still have an aiming point if the battery dies. For a general-purpose rifle within 200 yards, it’s a highly practical and reliable choice that complements the Tread’s philosophy.
Q: Can I use my existing AR-15 magazines with this?
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A: Yes. The Sig M400 Tread uses standard AR-15 pattern magazines. The included 30-round magazine is great, but you can also use PMAGs, USGI aluminum mags, or any other mil-spec compatible magazine. This commonality keeps your ongoing ammunition costs and accessories simple and affordable.
Look, if you’ve been weighing the cost of a new, reputable-brand AR against the desire to have a quality optic from the start, this package solves that equation. You’re getting a proven platform from SIG Sauer, a battle-ready Vortex sight, and extra hardware for a final price that’s tough to beat. This complete Sig M400 Tread Used package is available at firearms-missouri.com for Missouri residents and nationwide.
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