Tombstone Tactical


Tombstone Tactical Logo

Sig Sauer RM400-16B-C M400 Rifle 5.56mm 16in 30rd Black

Sig Sauer RM400-16B-C M400 Rifle 5.56mm 16in 30rd Black for sale at Tombstone Tactical.


Manufacturer: Sig Sauer
Part Number: RM400-16B-C
UPC Number: 798681432660
Category: AR-15 AR-10 - Rifles
Model: AR-15
Caliber: 5.56mm NATO
Action: Semi-Automatic
MSRP: $1099.00
Our Price: $992.52

Order Now


Sig Sauer RM400-16B-C AR-15 5.56mm NATO Semi-Automatic Rifles

The Sig Sauer RM400-16B-C M400 Rifle in 5.56mm features a 16-inch chrome lined barrel with 1-7" twist, black finish, collapsible stock, front post sight, flash hider, direct impingement gas operating system with rotating locking bolt, an overall length of 39 inches, an unloaded weight of 6.5 lbs, and a 30+1 round capacity.

From the manufacturer

Sig Sauer M400 Semi-automatic AR 223 Rem 556NATO 16" Black Synthetic 30Rd RM400-16B-C

  • Action - Semi-automatic
  • Barrel Length - 16"
  • Capacity - 30Rd
  • Finish/Color - Black
  • Caliber - 223 Rem
  • Caliber - 556NATO
  • Grips/Stock - Synthetic
  • Manufacturer - Sig Sauer
  • Manufacturer part # - RM400-16B-C
  • Model - M400
  • Type - AR

THE SIG M400 SERIES TACTICAL RIFLE, designed for use in law enforcement, military operations, or the sporting field as well as competitive shooting. The SIG M400 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.

Pricing and Availability: IN STOCK

This product is in stock and ready for sale. - A product status of In Stock indicates that as of the latest update, this product is on hand and ready for sale. It will most likely ship within 1-2 business days of receiving payment and proper paperwork.

In order to be competitive, our prices reflect a 3% discount for payment by cash, check, or money order. Other forms of payment will be subject to an additional $29.78 in processing fees. Arizona residents are subject to 8.3% sales tax.

You may order the Sig Sauer M400 Rifle 5.56mm 16in 30rd Black online now. Please click here or contact our sales department to place your order.

In-Store Availability

1 Week
Chino Valley
Chino Valley
1 Week

Shipping Requirements

When purchasing a firearm, federal law requires that it MUST ship to a licensed dealer in your state. If you need assistance locating a dealer to have your firearm shipped to, please contact us or enter your zip code at the GunBroker FFL dealer network website.

Not all items can legally ship to all 50 states. Please be sure this item is legal in your location before placing an order. If in doubt, please contact us.

NOTICE: Photos, descriptions, and stock status may be inaccurate. While we try our best to keep the information current, Tombstone Tactical can not be held liable for discrepancies. Please contact us with any questions.

Other caliber AR-15 Semi-Automatic Rifles models from Sig Sauer

SIG 516 G2 Patrol Rifle .300 BLK 16in 30rd Black

SIG 516 G2 Patrol Rifle .300 BLK 16in 30rd Black


SIG 516 G2 Patrol Rifle 7.62x39mm 16in 30rd Black

SIG 516 G2 Patrol Rifle 7.62x39mm 16in 30rd Black


Tombstone Tactical proudly distributes firearms and accessories from: