M400-SDI XSERIES | SDI GUN | SIG SAUER

M400-SDI X

Designed from the ground up to deliver maximum performance and reliability.

Models

Browse by individual sku to find the right product for you.

Availability
SKU
BARREL LENGTH (IN)
MAGS INCLUDED
MAG TYPE
STATE COMPLIANT
STOCK TYPE
BARREL MATERIAL
TRIGGER TYPE
TRIGGER SHAPE
FOREND TYPE
GRIP TYPE
RECEIVER FINISH
OVERALL LENGTH
OVERALL WIDTH
HEIGHT
ADJUSTABLE GAS SYSTEM
WEIGHT
COLLAPSED LENGTH
COLLAPSED LENGTH
FOLDED LENGTH
Buy Now
RM400-SDI-16B-P
5.56 NATO
16.0
(1) 30rd Polymer Mag
Semi-Auto
6-Position Magpul SL
Chrome / Moly Steel
SIG Flat Blade Match
Flat
1:7
Alloy
Polymer
Anodized
33.5 in [851 mm]
2.8 in [69.8 mm]
7.5 in [191 mm]
1/2 in - 28 tpi
Yes
Direct Impingement
7.0 lb [3.18 kg]
Features
Details
Reviews
Features

Ambidextrous Bolt Catch and Release

Hybrid Model Compensating Flash Hider for Reduced Muzzle Rise and Flash

SIG Matchlite Duo Trigger

Details

The M400-SDI XSERIES has been developed with the input from the professional instructors at SIG SAUER Academy. Building upon their decades of experience and countless hours of instruction, we have developed the M400-SDI XSERIES to meet the highest standards of performance and reliability.  With fully ambidextrous controls including a bolt catch/and release unique to the M400-SDI lower-receiver, the M400-SDI XSERIES delivers advanced performance for both left & right-handed shooters and makes transitional shooting easier than ever.  The free-floating handguard utilizes a new steel lockup design that significantly reduces handguard deflection by providing maximum rigidity and allows for accessories to be attached on all four sides with no effect on accuracy.  The 2-Stage Matchlite Duo trigger provides an out-of-the-box crisp 4.5 - 6.5lb pull weight with a flat blade design for a precision feel. The M400-SDI XSERIES utilizes the highest quality performance coatings to ensure maximum durability and reliability.

M400-SDI XSERIES FEATURES INCLUDE:

  • Ambidextrous Bolt Catch and Release
  • Hybrid Compensating Flash Hider
  • Dual Clamp Handguard Locking System for Reduced Deflection
  • Low Profile Gas Block with Mid-Length System
  • SIG Flatblade Match Trigger
  • Magpul SL Stock
Reviews
Compare Products
Items
Launch Compare

Zip Code Verification

Some states have legal restrictions for the purchase of items so we need to ask for your location.

Age Verification

Some products have purchase restrictions for those under the age of 21, please verify your age.