The Colt LE901-16S is a very versatile direct impingement gas-operated carbine with a 16.1-inch barrel. It's commonly referred to as a "modular carbine" because users can easily transform it from a 7.62mm NATO caliber carbine to a 5.56mm M4 carbine.
SHOT Show 2012 featured plenty of new gear for law enforcement officers. The show drew more than 61,000 attendees to Las Vegas for the January event and added several "law enforcement only" halls for vendors. View our gallery and read our two-part coverage of the show, "Report From the Aisles" and "Best of Show." Photos by Mark W. Clark.
Despite the industry's attempt to transform shooting sports and self-defense into some kind of video game for the Generation Z folks, there was still plenty of serious hardware for law enforcement at this year's show.
In recent years more and more manufacturers have developed new takes on AR-style rifles, resulting in four major operating systems for the common patrol rifles used by American law enforcement. Let's take a look at the four operating systems and their pros and cons