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It came as a surprise several years ago when SIG Sauer introduced a direct gas impingement system AR-style variant, the M400 semi-automatic-only carbine, which has some distinct external and internal differences from most AR-style rifles. You can learn more about the M400 in this "Rifleman Review" segment from a recent episode of American Rifleman TV. For more videos like this, visit AmericanRifleman.org/artv.
Despite the incredible array of polymer-frame, striker-fired, semi-automatic handguns on the market, the classic revolver not only refuses to die, it has seen something of a resurgence in recent years.
For 2026, the semi-automatic shotgun market has seen even more growth, with some manufacturers expanding their current offerings and other makers entering the marketplace with novel designs.
For the past 100 years, the Sporting Arms and Ammunition Manufacturers’ Institute (SAAMI) has established the standards that ensure our safety when using modern shotshells, cartridges, firearms and more.