The M400 has been subjected to rigorous field testing by many law enforcement agencies and the military. California Highway Patrol just contracted with SIG on the M400 after testing the COLT and HK. M400 performed above and beyond expectations and the price was less than the other two.
Thousands of rounds without cleaning, mudd test, ice test, drop test, impact testing, sand test, all passed with flying colors.
SIG is able to keep high production numbers.
Nearly every law enforcement officer in the large metropolitan area I work is buying the SIG. The LEO price for the M400 FDE is $906. The 516 is $1200. The 716 is $1600.
The SIG rep explained that for 2013 the pricing on the SIGs remains relatively low, but will increase by a few hundred in 2014. So the price of these rifles will go up.
May God make smooth the path you follow!