Sig Sauer M400 Elite for sale
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Sig Sauer M400 Elite TI California Compliant 5.56 Semi-Automatic AR-15 Rifle - RM400-16B-E-TI-CA
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
16"
Caliber:
5.56×45mm NATO
Capacity:
10+1
Rounds:
10
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Sig Sauer M400 Elite CO Compliant 5.56 Semi-Automatic AR-15 Rifle - RM40016BERCO
Brand:
Sig Sauer
Action:
Semi-Auto
Barrel Length:
16in
Caliber:
5.56×45mm NATO
Capacity:
15+1
Finish Per Color:
Black
Frequently Asked Questions
Sig Sauer M400 Elite for sale
How much is the SIGM400 elite?
The SIG Sauer M400 Elite typically sells for around $1,150 on our marketplace, with listings ranging from $1,023 to $1,270. Retail pricing on comparable M400 models runs roughly $900–$950. Check current inventory for real-time pricing and availability.
Is the SIGM400 a good AR-15?
The SIG Sauer M400 Elite is a higher-tier AR-15 variant, distinct from the budget-oriented M400 Tread. It offers reliable performance and SIG's consistent quality control, making it a strong choice for range use and home defense. A solid option for AR owners who want a dependable, premium-grade rifle.
Is the SIGM400 a 556 or 223?
The SIG M400 is chambered in 5.56 NATO, which also safely fires .223 Remington. A 5.56 chamber has slightly more headspace than a .223 chamber. Never fire 5.56 NATO in a rifle marked .223 only. Check your barrel's markings to confirm your specific model.
Is the SIGM400 a pistol or rifle?
SIG Sauer makes both M400 rifle and pistol variants. The M400 Tread rifle features a longer barrel, while the M400 Tread pistol has an 11.5-inch barrel with a carbine-length gas system. Both are semi-automatic AR-15 platform firearms chambered in 5.56 NATO. Check your specific model's markings to confirm which you have.
Can I shoot 223 out of my 5.56 AR-15?
Yes, a 5.56 NATO chamber safely fires .223 Remington ammunition. The 5.56 chamber is cut slightly larger to handle higher-pressure 5.56 loads, so the lower-pressure .223 round runs fine. Never shoot 5.56 NATO in a barrel marked .223 only—the pressure difference can be dangerous.
What are the key features of the SIG M400?
The SIG M400 Tread V2 features a 16-inch stainless steel barrel, mid-length gas system, SIG 2-Stage Matchlite Duo Trigger, enhanced M-LOK handguard, and a 6-position Magpul SL-K telescoping stock. The original M400 uses a chrome-lined barrel with a detachable carry handle and A2-style adjustable rear sight. Both are semi-automatic, chambered in 5.56 NATO/.223 Remington.
What are the different M400 models?
SIG Sauer produces many M400 variants including the Tread, Forge, Elite, Pro, Classic, SRP, Predator, and SDI XSeries models. Each differs in barrel length, handguard design, trigger quality, and sighting systems. Our marketplace currently lists 2 M400 variants. Consult SIG's website or your retailer for detailed specs on each model.