SIG M400
SIG Sauer M400 | |
---|---|
Type |
Carbine Semi-automatic rifle |
Place of origin |
Germany United States |
Service history | |
In service | 2010–present |
Production history | |
Designed | 2000s |
Manufacturer | SIG Sauer |
Produced | 2010 - present |
Variants |
Classic Hunter Black Enhanced Enhanced FDE Enhanced OD Green SRP SWAT Predator Varminter |
Specifications | |
Weight | 7.6 lbs |
Barrel length | 16-22 inches |
| |
Cartridge | 5.56×45mm NATO (.223 Rem.) |
Action | Direct gas impingement system, rotating bolt |
Feed system | AR compatible magazine |
The SIG M400 is a family of firearms manufactured by SIG SAUER. The rifle is based on the earlier 5.56×45mm AR-15, M16, and M4.
Design details
Operating mechanism
The SIG M400 is a semi-automatic firearm/rifle, intended for civilian and law enforcement markets. It fires from a closed bolt and uses a direct gas impingement system.
Features
Ergonomically, the SIG M400 is patterned after the AR-15-type rifle. It has a safety lever on the left side, to be used by the thumb of the shooting hand. Some newer models have an ambidextrous safety selector. The front gas block is railed to accept the front sight with a flip-up sight post. Most M400 models are equipped with an M16-A2 style bird-cage flash hider.
All models accept AR-15-style box magazines. These magazines are constructed in 5, 10, 20, 30, 40, 60, and 100 round variants. The later two are available from Surefire. The rifle is hammer-fired with a single-stage trigger in most models. Some models include a two-stage trigger from the factory.
The M400 has a telescoping skeletonized buttstock. The ACE-style stock moves forward and rearward in 6 positions. A spring-loaded release underneath the buffer tube area locks into each position.