Sig Sauer M400 Classic 5.56mm Rifle

  • Item Number: RM400-16B-C
  • /
  • View More Items by Sig Sauer
  • /
  • Condition: NEW
Sig Sauer M400 Classic 5.56mm Rifle
$1,249.99

Temporarily Out of Stock

Includes FREE shipping
  • FNH FN15 MILITARY COLLECTOR 5.56 M4 CARBINE

    FN FN15 Military Collector 5.56mm M4 Carbine
    $1,929.00

  • Hornady 5.56 NATO 75 gr BTHP Match Frontier 20/Box

    Hornady 5.56 NATO 75 gr BTHP Match Frontier 20/Box
    $12.99
    ($0.65 / round)

  • Hornady 5.56 NATO 62 gr FMJ Frontier 20/Box

    Hornady 5.56 NATO 62 gr FMJ Frontier 20/Box
    $9.79
    ($0.49 / round)

  • Hornady 5.56 NATO 55 gr FMJ (M193) Frontier 20/Box

    Hornady 5.56 NATO 55 gr FMJ (M193) Frontier 20/Box
    $8.99
    ($0.45 / round)

  • X Products M200 5.56 Blanks 50 Round

    X Products M200 5.56 Blanks 50 Round
    $39.99 $24.99
    ($0.50 / round)

  • Hornady 223 Rem 55 gr FMJ Frontier 20/Box

    Hornady 223 Rem 55 gr FMJ Frontier 20/Box
    $8.99
    ($0.45 / round)

  • PMC 223 Rem 55 gr FMJ BT Bronze 20/Box

    PMC 223 Rem 55 gr FMJ BT Bronze 20/Box
    $8.99
    ($0.45 / round)

  • Hornady 223 Rem 68 gr BTHP Match Frontier 20/Box

    Hornady 223 Rem 68 gr BTHP Match Frontier 20/Box
    $11.99
    ($0.60 / round)

  • Hornady 223 Rem 55 gr Soft Point Brass Training 50/Box

    Hornady 223 Rem 55 gr Soft Point Brass Training 50/Box
    $24.58
    ($0.49 / round)

  • Hornady 223 Rem 73 gr ELD Match 20/Box

    Hornady 223 Rem 73 gr ELD Match 20/Box
    $19.99
    ($1.00 / round)

  • Federal 223 Rem 55 gr Hollow Point Tactical Rifle Urban Police Trade Ammo 20/Box

    Federal 223 Rem 55 gr Hollow Point Tactical Rifle Urban Police Trade Ammo 20/Box
    $13.99
    ($0.70 / round)

  • Federal 223 Rem 55 gr Bonded SP Tactical Police-Trade Ammo 20/Box

    Federal 223 Rem 55 gr Bonded SP Tactical Police-Trade Ammo 20/Box
    $19.99
    ($1.00 / round)

  • Hornady 223 Rem 55 gr V-MAX Varmint Express 20/Box

    Hornady 223 Rem 55 gr V-MAX Varmint Express 20/Box
    $22.49
    ($1.12 / round)

  • MAGPUL PMAG 30 GEN M2 AR-15 556 NATO 30 RD MAG

    Magpul PMAG GEN M2 5.56 NATO 30 Round Black Magazine
    $12.95 $9.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD MAG

    Magpul PMAG GEN M3 5.56 NATO 30 Round Black Magazine
    $14.95 $11.99

  • MAGPUL PMAG 20 GEN M3 AR-15 556 NATO 20 RD MAG

    Magpul PMAG GEN M3 5.56 NATO 20 Round Black Magazine
    $10.99

  • AMEND2 MOD 2 AR-15 5.56 MM 30 RD BLACK MAG

    Amend2 AR15/M4 Mod.2 5.56 NATO 30 Round Magazine (Black)
    $14.99 $6.97

  • MISSION FIRST TACTICAL AR-15 5.56 NATO 30-ROUND MAGAZINE

    Mission First Tactical AR-15 5.56 NATO 30-Round Magazine
    $6.97

  • MAGPUL PMAG 40 GEN M3 AR-15 556 NATO 40 RD MAG

    Magpul PMAG 40 AR/M4 GEN M3 5.56 NATO 40 Round Magazine
    $21.99

  • ATI SCHMEISSER S60 223/5.56MM 60-ROUND AR-15 MAGAZINE WITH WINDOW (GEN2)

    American Tactical Schmeisser S60 5.56 NATO 60 Round AR-15 Magazine with Window (Gen2)
    $84.95 $24.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD MAG (TAN)

    Magpul PMAG GEN M3 5.56 NATO 30 Round Coyote Tan Magazine
    $12.99

  • MAGPUL PMAG 10 GEN M3 AR-15 556 NATO 10 RD MAG

    Magpul PMAG GEN M3 5.56 NATO 10 Round AR-15 Magazine
    $12.99

  • MAGPUL PMAG 30 GEN M3 AR-15 556 NATO 30 RD WINDOW MAG

    Magpul PMAG GEN M3 5.56 NATO 30 Round Black Magazine with Window
    $14.99

  • AMEND2 AR15 30RND 5.56MM MOD-C TRANSLUCENT YELLOW DONT TREAD ON ME MAG

    Amend2 AR15 5.56 NATO 30 Round Factory Magazine Translucent Yellow
    $14.99

  • MAGPUL TMAG 30RND 223RE/5.56 NATO COMPATIBLE W/AR15/ OLIVE DRAB TRANSLUCENT

    Magpul TMAG 30 AR/M4 Gen M3 223/5.56mm 30-Round Translucent OD Magazine
    $23.95 $19.99

Product Description

Designed for use in law enforcement, military operations, or the sporting field as well as competitive shooting. The SIGM400 is a true AR platform tactical rifle. Provides unparalleled accuracy, with a 16” chrome-lined and phosphate coated barrel that provides maximum durability and corrosion resistance. A 7075-T6 aircraft grade aluminum forged lower receiver adds to the durability and reliability.

    • Direct impingement gas operating system with rotating locking bolt
    • 5.56 x 45 mm NATO Chrome-lined barrels with phosphate finish
    • Accepts most M16 type magazines
    • A2 Type flash supressor
    • ”F” marked fixed front sight

Firearm Specifications

  • Caliber: 5.56 X 45mm NATO
  • Barrel Length: 16”
  • Action: Semi-Auto
  • Trigger Type: MIL-STD
  • Trigger Weight: 7.6 lbs
  • Overall Length: 39.5”
  • Magazine Capacity: 30 Rounds

Customer Comments & Questions

Customer Reviews

(5 out of 5) Awesome zombie killer
by David from Port Hueneme, California on June 21, 2017

Great gun. No problems. It's a Sig