Manufaturer Part Number: RM400SDI16BFDE
The m400-sdi x was designed to meet the highest standards of performance and reliability.From the rifle's full suite of ambidextrous controls to its proven mid-length gas system.Features fully ambi controls- safety, charging handle, bolt catch & mag release; 2-stage matchlite duo trigger; free floating m-lok; mid-length direct impingement operating system and 6 position magpul sl stock.

Action: Semi-Auto
Caliber: 5.56 NATO
Barrel Length: 16"
Capacity: 30+1
Trigger: Sig Two-Stage Matchlite Duo
Safety: Lever
Oal: 33.25' - 36.50"
Weight: 7 lbs
Stock Description: 6 Position Magpul SL
Muzzle: Sig Flash Hider-Compensator
Receiver Material: Aluminum
Sights: None
Barrel Description: Threaded
Twist: 1:7"
Barrel Length Range: 16" to 16.99"
Weight Range: 7 lbs to 7.99 lbs
Hand: Ambidextrous
Stock Finish Group: Black