Sig Sauer M400 Tread V2 *CA Compliant 223 Rem/5.56 NATO 10+1 16" Stainless Threaded Barrel, Black Anodized Aluminum Receiver w/Picatinny Rail, M-LOK Handguard, Magpul MOE Black Polymer Stock, Black Polymer Grip, Ambidextrous
The M400 Tread features a free-floating M-LOK enhanced handguard that is lightweight yet rigid for extreme control and ease of mounting accessories such as lights and handstops. The lower receiver has an ambidextrous safety for right or left-handed operation and includes an integrated QD mount for easy sling attachment. Chambered in 5.56 NATO, the M400-TREAD has a 16" stainless steel barrel fitted with a 3-prong flash hider. The M400-TREAD also has a mid-length gas system offering smoother operation and reduced recoil. A SIG Matchlite 2-stage trigger for enhanced control and improved accuracy as well as a MAGPUL SL-K telescoping stock for easy adjustment and a customized fit.
Brand Sig Sauer
Category Tactical Rifles
Series Tread V2 *CA Compliant
Model M400
Caliber 223 Rem / 5.56 NATO
Barrel Length Range 16" to 16.99"
Gun Platform AR Style
Operating System Direct Impingement
Stock Finish Group Black
Capacity 10+1
Stock Material Polymer
Action Semi-Auto
Oal 35.75"
Hand Ambidextrous
Sights None
Barrel Finish Stainless
Barrel Material Stainless
Muzzle 3-Port Brake
Twist 1:8"
Receiver Description Picatinny Rail
Grips Black Polymer
Handguards M-LOK
Height 7.10"
Receiver Material Aluminum
Safety Ambidextrous
Thread Pattern 1 / 2"x28
Width 2.60"
Stock Description Magpul MOE
Barrel Description Threaded
Barrel Length 16"
Max Capacity 10
Receiver Finish Black Anodized
Trigger Two-Stage Matchlite Duo
Weight 6.50 lbs
Stock Finish Black
Caliber Dictionary
The Below Information Has Been Provided From Our Gun Caliber Dictionary And Is Meant For Informational Purposes Only. It Is Not Intended to Describe The Unique Specifications For This Ammunition.
The 5.56X45mm NATO cartridge was designed by James Sullivan, a member of Eugene Stoner's engineering team that developed both the M16 rifle and its original cartridge. The 5.56X45mm NATO was adopted by the U.S. military in 1964 and by NATO in 1980. With bullet diameter of .224-inch, the original M193 military cartridge used a 55-grain bullet at 3250 fps; the current M855A1 cartridge, developed by FN, uses a 62.5-grain bullet at 3020 fps, offering greater range and better penetration. The civilian version of the 5.56X45mm is 223 Remington; the cartridges are dimensionally identical but military chamber dimensions and specifications for military brass are different. It is considered safe to use 223 Remington ammo in a 5.56X45MM NATO chamber, but not a good idea to use 5.56X45mm ammo in a rifle specifically chambered for the 223 Remington. Although the stopping power of .22-caliber bullets remains controversial the 5.56X45mm has served well in now multiple generations of M16 rifles. — Craig Boddington
