If it ain’t broke, don’t fix it. And when it comes to Eugene Stoner’s original direct gas impingement system (DGIS), that is exactly the feeling of many AR rifle fans. In all fairness, the AR platform has been successfully serving militaries worldwide, including our own, for more than 40 years.
This may explain why Sig Sauer, which originally entered the AR market with the gas piston-driven SIG516, is now offering its M400 variant, a true-blue direct gas impingement semi-auto AR carbine. Chambered in 5.56×45 mm NATO, the M400 appears and operates like a standard AR but with many unique Sig Sauer enhancements that set this rifle apart. The result is a high-quality AR ideal for law enforcement patrol use.
How a 150-year-old Swiss wagon manufacturer started making muskets for their nation’s military and ended up manufacturing some of the best AR rifles in the U.S. is undoubtedly a long and interesting story. Unquestionably, “Swiss-made” is synonymous with quality, and when it comes to their national defense this commitment to reliability, effectiveness and attention to detail is carried to the Nth degree.