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Sig Sauer M400 B5 Centerfire Rifle

Item # 782225
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Additional Information:

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  • To buy online and deliver to a Gander Mountain store or an Independent Firearms Dealer, simply add this item to your cart. Click here for additional details.
  • Firearms shipping charge of $25.00 per item.
  • You must be at least 18 years old to purchase this item. State and local laws may vary.


  • Flip-Up Sights

  • 6-Position Telescoping Stock

  • 30-Round Magazine

Product Summary

Starting with the SIGM400 carbine, the Sig Sauer improved take on the direct impingement AR-style rifle, a B5 Systems SOPMOD 6-position telescoping stock, pistol grip, and KEYMOD carbine handguards are added in gray. Featuring 1:7 twist with Nitride treated barrel, the SIGM400 B5 carbines are machined from 7075-T6 aircraft grade aluminum and are finished in hard coat anodize finish. Comes with Sig Sauer locking flip-up rear sights and has a M1913 Picatinny flat-top upper receiver.

Model M400 B5 Gray
Type Centerfire Rifle
Action Semi-Auto
Caliber .223 Rem./5.56 NATO
Barrel Length 16"
Weight 6 Lbs. 7 oz
Sights Flip-Up
Finish: Stock Gray
Finish : Barrel & Receiver Blued
Capacity 30 + 1