The APF .300 Winchester Magnum Rifle (APF part no. MLR300WMCF) is a precision-focused build for shooters who want serious reach without the extra weight of a traditional steel-barreled rig. It’s built around a 24-inch Proof Research carbon fiber barrel that sheds weight while managing heat far better than a standard contour. An adjustable Superlative Arms gas block, a crisp CMC flat-blade trigger, and a Lancer carbon fiber stock round out a rifle designed for long-range accuracy in the field or at the range. Four included magazines mean you can spend more time shooting and less time reloading between strings.

Key Specifications

• Chambered in .300 Winchester Magnum for serious long-range performance.
• 24-inch Proof Research carbon fiber barrel cuts weight while improving heat dissipation over a steel barrel.
• Threaded at 5/8×24 to accept standard .30-caliber muzzle devices.
• Runs a rifle-length gas system with a .936 Superlative Arms adjustable gas block for tunable cycling.
• Bolt carrier group is finished in nitride for smooth cycling and easy cleaning.
• CMC 3.5-pound flat-blade trigger delivers a crisp, consistent break.
• Equipped with an MLR muzzle brake to help tame recoil from the magnum chambering.
• Lancer carbon fiber stock keeps overall weight down without sacrificing rigidity.
• APF 15.5-inch M-LOK handguard provides a full-length mounting platform for optics and accessories.
• Ships at approximately 9.0 pounds and includes four magazines.

Frequently Asked Questions

What caliber is this rifle chambered in? .300 Winchester Magnum.

What kind of barrel does it use? A 24-inch Proof Research carbon fiber barrel for reduced weight and improved heat management.

How many magazines are included? Four magazines ship with the rifle.

Buy the APF .300 Winchester Magnum Rifle

Ready for a long-range build without the extra heft of a steel barrel? Order this APF rifle from our AR rifles collection and we’ll arrange fast, insured shipping to your local FFL from our Lubbock, Texas shop.