No mag included The Bear Creek Arsenal BC-15 brings big-bore .450 Bushmaster performance to an affordable, feature-packed AR-15 platform, giving hunters serious knockdown power at close-to-medium range with a semi-auto action. This build features an 18-inch heavy-profile barrel with a parkerized finish and a 1:24 twist rate paired with a mid-length gas system, delivering the stability and accuracy needed to make the most of the straight-walled .450's hard-hitting 250-grain projectiles. With a 4-round magazine capacity, it stays compliant with many states' straight-wall hunting regulations while still offering the quick semi-auto follow-up shot that bolt-actions can't match. Rounding out the package is a 15-inch M-LOK handguard for accessory mounting, a forged 7075 aluminum flat-top upper receiver, and a mil-spec lower - combining Bear Creek Arsenal's value-driven build quality with a caliber purpose-built for deer, hog, and bear hunting.