Great Lakes Firearms 5.56 NATO 7.5" 31-Round Threaded Barrel Carbine

The Great Lakes Firearms 5.56 NATO 7.5" 31-Round Threaded Barrel Carbine is purpose-built for operators and shooters who demand a compact, magazine-fed platform capable of delivering rifle-caliber performance in confined spaces. This short-barreled rifle (SBR) configuration excels in close-quarters tactical scenarios, home defense setups, and specialized law enforcement applications where maneuverability matters as much as firepower. With a 7.5-inch barrel and threaded muzzle, this carbine bridges the gap between pistol-caliber carbines and full-length rifles, offering the velocity and ballistic consistency of 5.56 NATO in a footprint that won't compromise movement through doorways or vehicle interiors.

The 5.56 NATO chambering ensures compatibility with military-standard ammunition and proven duty loads, while the threaded barrel accommodates suppressors, flash hiders, or muzzle brakes—critical for sound signature reduction, muzzle flash control, or recoil management depending on your operational needs. Weighing 9.6 pounds, this carbine maintains reasonable control characteristics even in dynamic shooting situations, and the 31-round capacity provides substantial on-board firepower without requiring immediate magazine changes during engagement. Great Lakes Firearms' engineering centers around reliability and shootability; the platform accepts standard AR-pattern magazines and components, allowing customization and field-proven upgrades. The short barrel generates approximately 2,400–2,600 feet per second with full-power 5.56 loads, sufficient for barrier penetration and terminal performance out to 100+ yards—a practical range envelope for tactical and self-defense contexts.

This carbine appeals to home defenders, law enforcement specialists, and tactical shooters who prioritize speed of target acquisition and rapid repositioning over extended standoff distance. Note that the 7.5-inch barrel classifies this as a short-barreled rifle under federal law (CFR Title 27), requiring ATF registration via Form 1 for civilian ownership unless built as a pistol or AOW. The threaded muzzle is fully compatible with standard 1/2x28 thread-pitch accessories, including sound suppressors, flash hiders, and compensators that extend beyond the muzzle crown. Magazine compatibility with standard 5.56 NATO AR-pattern magazines—including the included 31-round capacity—ensures logistical simplicity and ammunition interoperability with existing rifle platforms in your inventory or team environment.