Sig Sauer Guns and Accessories
Owned and Operated by Osage County Guns
My Cart

Shopping Cart

Your shopping cart is empty: 0
Total: $0.00
View Cart  |  Checkout

Shop For Sig Sauer:

SIG556 Rifles
SIG551 Rifles
SIG516 Rifles
SIG716 Rifles
SIG522 Rifles
SSG3000 Rifles
SIG Short Barrel Rifles
SIG50 Rifle

Contact Us

Need assistance? Call us at 573-859-6044.

Please note this site is owned and operated by Osage County Guns. We are not the manufacturer, Sig Sauer.


Sig Sauer M400 AR-15 Rifle

Product Code: RM400-16B-C

Price: $989.00



Please enter and submit your email address below if you want to recieve email when the stock is available.


Our shipping prices are available on our terms and conditions page.

Please call us at 573-859-6044 if you have questions but note that all orders must be placed online. Our store hours are available on our contact page.


THE SIGM400 SERIES TACTICAL RIFLE, 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


Item Number RM400-16B-C

Caliber 5.56 X 45mm NATO

Action Type Semi-Auto

Trigger Pull DAO

Trigger Pull DA

Trigger Pull SA

Overall Length 39.5 in

Trigger Type MIL-STD

Trigger Weight 7.6 lbs

Length w/Stock Collapsed

Length w/Stock Folded

Overall Height

Overall Width

Barrel Contour

Barrel Length 16 in

Rifling 1 in 7 in

Sight Radius


Stock Type

Weight w/o Mag 6.5 lbs

Operating System Direct impingement

Gas System

Weight w/Mag

Weight w/Bolt Carrier Assembly

Flash Suppressor


Muzzle Thread

Mag Capacity 30 Rounds

CA Compliant No

MA Compliant No



Frame Material

Frame Finish

Slide Finish

Accessory Rail No

Mag Type AR-15 Type Aluminum


Features Direct impingement gas operating system with rotating locking bolt, M16A2 Type flash supressor, Detachable carry handle M16A2 type rear sight, Accepts most M16 type magazines

MSRP $1,099.00

Product Reviews

[+] Submit Your Review

Related Items