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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.
Manufacturers have achieved excellent results with small-caliber bottleneck designs, as evidenced by cartridges such as the .357 SIG and 5.7x28 mm. The .30-caliber 7.5 FK continues this legacy and is now chambered in the FK Brno PSD-C.
For the entirety of 2026, we're celebrating America's 250th anniversary, and the firearm industry continues to roll out commemorative products to mark the occasion.
The "Bulletproof Bubble" is one of the most frustrating things a shooter can experience, because it doesn't make any sense. Every round seems to land all around the exact center of your point of aim instead of in it.