SIG Sauer M400 SDI Semi-Auto 16 in Barrel, .223 REM/5.56 NATO AR Rifle

SIG Sauer M400 SDI Semi-Auto 16 in Barrel, .223 REM/5.56 NATO AR Rifle

$1,658.99

SIG Sauer M400 SDI is a semi-auto AR rifle chambered for .223 REM/5.56 NATO. It has a 16 in barrel with 1:7 in twist and 36.8 in overall length. Ambi safety control, no sights, and 1/2-28 tpi threads.

10 in stock

SKU: SGRM400-SDI-16B-P Category: Tag: Brand:

Description

SIG Sauer M400 SDI is a semi-auto AR rifle built for the .223 REM/5.56 NATO cartridge. It has a 16 in barrel with a 1:7 in twist rate and an overall length of 36.8 in. The rifle uses an ambi safety control and does not come with sights. A 1/2-28 tpi thread pattern is provided for compatible muzzle devices.

Key details

  • Semi-auto action
  • .223 REM/5.56 NATO chambering
  • 16 in barrel with 1:7 in twist rate
  • Ambi safety control
  • No sights included
  • 1/2-28 tpi thread pattern

Specifications

Caliber .223 REM/5.56 NATO
Action Semi-Auto
Barrel Length 16 in
Overall Length 36.8 in
Rate of Twist 1:7 in
Safety AMBI SAFETY CONTROL
Sights No
Thread Pattern 1/2-28 tpi

Additional information

UPC

798681664634
Manufacturer

Sig Sauer
Manufacturer Part Number

RM400-SDI-16B-P
Action

Semi-Auto
ATF Type

MODERN SPORTING RIFLE
Barrel Finish

Black FNC
Barrel Length

16''
Caliber/Gauge

.223 REM/5.56 NATO
Capacity

30
Length

36.8''
Magazine Included

1 x 30-Round
Model

M400
Number of Magazines

1 30 rd.
Package Height

4.3
Package Width

11.3
Product Type

AR
Rate of Twist

1:7"
Safety

AMBI SAFETY CONTROL
Shipping Weight

10.0
Sights

No
State Restriction (CA)

NO DIRECT SHIP TO CALIFORNIA
State Restriction (RI)

NO DIRECT SHIP TO RHODE ISLAND
State Restriction (WA)

NO DIRECT SHIP TO WASHINGTON
Thread Pattern

1/2"-28 tpi
Units per Box

1

How You Get This Firearm

Pickup or ship to your FFL

This is a firearm. It requires an FFL transfer before you can take possession. Pick it up in person at our store (4755 US-280, Birmingham, AL 35242), or have it shipped to the FFL of your choice anywhere in the country.

Paperwork at pickup

A completed ATF Form 4473 and a NICS background check are required at pickup, per federal law. A valid Alabama concealed carry permit (regular or lifetime) can serve as an ATF-recognized alternative to the NICS check.

Transfer fees

Buying this listed item directly from us carries no transfer fee. If you'd rather ship in a firearm you bought elsewhere for us to receive and transfer to you, that incoming transfer runs $50. See our FFL Transfers page for the full process.

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