Alexander Arms R300-ST | .300 AAC Blackout | 16in

The Alexander Arms R300-ST is a semi-automatic modern sporting rifle chambered in .300 AAC Blackout with a 16-inch barrel and anodized black finish. It ships with an Adaptive Tactical EFX stock, A2-style grip, M-LOK handguard and an included 30-round magazine (capacity is listed variably in source materials). This model is optics-ready; a rugged low- to mid-power variable like the Vortex Strike Eagle 1-6×24 is a practical match under $1,000 for close-to-medium range use.

Common real-world applications include short- to medium-range precision shooting with subsonic or supersonic .300 BLK loads and hunting or predator/varmint field work where the .300 BLK cartridge is appropriate.

Product Specifications

• The UPC is 819511021998.
• The manufacturer is Alexander Arms.
• The model designation is R300-ST (Standard).
• The caliber is .300 AAC Blackout.
• The action type is semi-automatic.
• The barrel length is 16 inches.
• The rate of twist is listed variably; the specification is not specified in source data.
• The metal finish is anodized black.
• The stock material is synthetic.
• The stock description is Adaptive Tactical EFX stock (black).
• The handguard type is M-LOK.
• The muzzle device is an A2 flash hider.
• The magazine capacity is listed variably; the specification is not specified in source data.
• The firearm uses a detachable magazine (yes).
• The receiver material is 7075-T6 aluminum.

This rifle provides a familiar AR-style ergonomics package with an Adaptive Tactical stock and M-LOK handguard, suited to shooters who want a factory-configured .300 BLK platform that is ready for optics and common AR accessories. It balances feature set and field utility for short- to medium-range shooting scenarios while keeping controls and interface consistent with standard AR training and parts availability.

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