Sig Sauer SIG M400 5.56 NATO AR-15 Semi-Auto 16” Rifle w/ Factory Box

SOLD FOR: $855

WOA#: WY230404RY002

Make: Sig Sauer

Model:  M400

Serial Number: 38B013400

Year of Manufacture: Modern

Caliber: 5.56/.223

Action Type: Semi-Automatic, Direct Impingement

Markings: The left side of the receiver is marked “SIG SAUER / SIG M400 / 5.56 NATO”, “SIG SAUER INC. / EXETER-NH-USA / 38B013400” with bullet pictograms for the safety options.  Pistol grip is marked “MAGPUL” and “MOE / MADE IN USA”.  The right side of the charging handle housing has a splintered A Forge Mark.  The right side of the handguard is marked “MOE”.  The barrel is marked “5.56 NATO 1/7”.  The buttstock is marked, “MAGPUL INDUSTRIES” and “MADE IN USA MOE”.

Barrel Length: 16”.  17” with A2 Flash Hider.

Sights / Optics:  The top of the receiver is a flat top picatinny rail for all your favorite sights and optics.  The front sight is an A2 style adjustable post.  The picatinny rail is mounted with a rear back up aperture low profile sight.

Stock Configuration & Condition:  The buttstock, pistol grip, and handguard are all FDE Magpul MOE furniture.  The buttstock features sling slots, 6 position adjustment, and rubber buttpad.  The pistol grip is textured with a storage compartment. The handguard is ventilated and Mid Length.   The lower receiver features ambi QD mounts and Ambi Mag release.  The LOP measures 13.5” from the front of the trigger to the back of the fully extended buttpad.  The gas block features Sling swivels on the bottom and left positions.  The stock rates in Excellent condition with no sign of handling wear.

Magazine Quantity & Condition: None. Can take standard AR-15 magazines.

Type of Finish:  FDE

Finish Originality: Original

Bore Condition: The bore is bright and the rifling is sharp.  There is no erosion in the bore.

Overall Condition:  This rifle retains about 99% of its metal finish. The balance of the finish shows no operation wear.   The screw heads are sharp and pins are unmarred. The markings are clear. Overall, this rifle rates in about Excellent condition.  It appears unfired outside of factory testing.

Mechanics:  The action functions correctly. This firearm has ambidextrous safety.  We did not fire this rifle. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements.

Box, Paperwork & Accessories:  This rifle comes with its factory box, owner’s manual, and chamber lock with keys.  All in Excellent condition.

Our Assessment: The Sig Sauer M400 is a direct impingement AR-15-style rifle that’s built to meet the high standards set by Sig Sauer, a renowned firearms manufacturer. It’s chambered in the widely popular 5.56x45mm NATO cartridge, offering excellent ballistic performance and ammunition availability.

One of the standout features of the M400 is its build quality. It’s built on a sturdy and reliable platform, utilizing high-quality materials and precise manufacturing techniques. The rifle incorporates a durable upper and lower receiver, ensuring long-lasting performance and resistance to the elements.

Another key aspect of the M400 is its versatility. It comes with a range of customization options, allowing you to tailor the rifle to your specific needs and preferences. Whether you’re looking to add optics, lights, or other accessories, the M400’s modular design makes it easy to customize and adapt to your shooting style.

Additionally, the M400 incorporates Sig Sauer’s attention to detail and ergonomic design. The controls are well-placed and intuitive, ensuring smooth and effortless operation. The rifle also features a comfortable and adjustable stock, allowing for a personalized fit and optimal shooting comfort as well as ambidextrous mag release.

So, whether you’re a professional in the market for a reliable duty rifle or a shooter looking for a versatile and high-performance AR-15, the Sig Sauer M400 is definitely worth considering.  It combines Sig Sauer’s renowned craftsmanship with the proven reliability of the AR-15 platform, making it a formidable choice in any shooting scenario.  This rifle comes clean with its factory box in a beautiful FDE finish and is sure to set it apart in a market saturated with black AR rifles.  Please see details below and good luck!

Sig Sauer SIG M400 5.56 NATO AR-15 Semi-Auto 16” Rifle w/ Factory Box
Sig Sauer SIG M400 5.56 NATO AR-15 Semi-Auto 16” Rifle w/ Factory Box